diff --git a/cms/models.py b/cms/models.py
index ad14e38935..7ee18b5226 100644
--- a/cms/models.py
+++ b/cms/models.py
@@ -750,25 +750,35 @@ def products(self):
         return page_data
 
     def get_context(self, request, *args, **kwargs):
+        hubspot_portal_id = settings.HUBSPOT_PORTAL_ID
+        hubspot_home_page_form_guid = settings.HUBSPOT_HOME_PAGE_FORM_GUID
+
         if request.user.is_authenticated:
-            user = request.user.email
+            user = request.user.id
         else:
             if "anonymous_session_id" not in request.session:
                 request.session["anonymous_session_id"] = str(uuid.uuid4())
             user = request.session["anonymous_session_id"]
-        hubspot_portal_id = settings.HUBSPOT_PORTAL_ID
-        hubspot_home_page_form_guid = settings.HUBSPOT_HOME_PAGE_FORM_GUID
+
         show_new_featured_carousel = features.is_enabled(
-            features.ENABLE_NEW_HOME_PAGE_FEATURED, False, user
+            features.ENABLE_NEW_HOME_PAGE_FEATURED,
+            False,
+            user,
         )
         show_new_design_hero = features.is_enabled(
-            features.ENABLE_NEW_HOME_PAGE_HERO, False, user
+            features.ENABLE_NEW_HOME_PAGE_HERO,
+            False,
+            user,
         )
         show_home_page_video_component = features.is_enabled(
-            features.ENABLE_NEW_HOME_PAGE_VIDEO, False, user
+            features.ENABLE_NEW_HOME_PAGE_VIDEO,
+            False,
+            user,
         )
         show_home_page_contact_form = features.is_enabled(
-            features.ENABLE_NEW_HOME_PAGE_CONTACT_FORM, False, user
+            features.ENABLE_NEW_HOME_PAGE_CONTACT_FORM,
+            False,
+            user,
         )
 
         return {
diff --git a/cms/models_test.py b/cms/models_test.py
index bce68bfb06..dcafd9b14f 100644
--- a/cms/models_test.py
+++ b/cms/models_test.py
@@ -170,8 +170,16 @@ def test_course_page_context(
             member.linked_instructor_page
             for member in course_page.linked_instructors.order_by("order").all()
         ],
-        "new_design": features.is_enabled("mitxonline-new-product-page"),
-        "new_footer": features.is_enabled("mitxonline-new-footer"),
+        "new_design": features.is_enabled(
+            "mitxonline-new-product-page",
+            False,
+            request.user.id if request.user.is_authenticated else "anonymousUser",
+        ),
+        "new_footer": features.is_enabled(
+            "mitxonline-new-footer",
+            False,
+            request.user.id if request.user.is_authenticated else "anonymousUser",
+        ),
     }
 
     context = course_page.get_context(request=request)
diff --git a/cms/templates/product_page.html b/cms/templates/product_page.html
index 831cb59f57..b3e4e6c3ae 100644
--- a/cms/templates/product_page.html
+++ b/cms/templates/product_page.html
@@ -118,6 +118,7 @@ <h2>Who can take this course?</h2>
                 {% if page.is_program_page %}
                 <input id="programId" type="hidden" value="{{page.program.readable_id}}" />
                 {% endif %}
+                <input id="userId" type="hidden" value="{{ user.id }}" />
 
                 <div class="w-100" id="productDetailEnrollment"></div>
               </div>
diff --git a/frontend/public/src/components/AnonymousMenu.js b/frontend/public/src/components/AnonymousMenu.js
index 574e439d8e..db23b3303a 100644
--- a/frontend/public/src/components/AnonymousMenu.js
+++ b/frontend/public/src/components/AnonymousMenu.js
@@ -12,7 +12,7 @@ type Props = {
 
 const AnonymousMenu = ({ mobileView }: Props) => {
   const identifierPostfix = mobileView ? "Mobile" : "Desktop"
-  const newDesign = checkFeatureFlag("mitxonline-new-header")
+  const newDesign = checkFeatureFlag("mitxonline-new-header", "anonymousUser")
   return (
     <ul>
       <li>
diff --git a/frontend/public/src/components/CourseInfoBox.js b/frontend/public/src/components/CourseInfoBox.js
index 448a761fca..eeb07e0e5e 100644
--- a/frontend/public/src/components/CourseInfoBox.js
+++ b/frontend/public/src/components/CourseInfoBox.js
@@ -11,16 +11,16 @@ import type { BaseCourseRun } from "../flow/courseTypes"
 import { EnrollmentFlaggedCourseRun, RunEnrollment } from "../flow/courseTypes"
 import { getCookie } from "../lib/api"
 import { isWithinEnrollmentPeriod } from "../lib/courseApi"
-import type { User } from "../flow/authTypes"
+import type { CurrentUser } from "../flow/authTypes"
 import { routes } from "../lib/urls"
 
 type CourseInfoBoxProps = {
   courses: Array<BaseCourseRun>,
   courseRuns: ?Array<EnrollmentFlaggedCourseRun>,
   enrollments: ?Array<RunEnrollment>,
+  currentUser: CurrentUser,
   toggleUpgradeDialogVisibility: () => Promise<any>,
-  setCurrentCourseRun: (run: EnrollmentFlaggedCourseRun) => Promise<any>,
-  currentUser: User
+  setCurrentCourseRun: (run: EnrollmentFlaggedCourseRun) => Promise<any>
 }
 
 const getStartDateText = (run: BaseCourseRun, isArchived: boolean = false) => {
diff --git a/frontend/public/src/components/CourseProductDetailEnroll.js b/frontend/public/src/components/CourseProductDetailEnroll.js
index 9dd5aa2812..00b43ed86a 100644
--- a/frontend/public/src/components/CourseProductDetailEnroll.js
+++ b/frontend/public/src/components/CourseProductDetailEnroll.js
@@ -625,7 +625,10 @@ export class CourseProductDetailEnroll extends React.Component<
       enrollments,
       enrollmentsIsLoading
     } = this.props
-    const showNewDesign = checkFeatureFlag("mitxonline-new-product-page")
+    const showNewDesign = checkFeatureFlag(
+      "mitxonline-new-product-page",
+      currentUser && currentUser.id ? currentUser.id : "anonymousUser"
+    )
 
     let run,
       product = null
diff --git a/frontend/public/src/components/Header.js b/frontend/public/src/components/Header.js
index 60997faa7d..c65dfdef45 100644
--- a/frontend/public/src/components/Header.js
+++ b/frontend/public/src/components/Header.js
@@ -1,6 +1,8 @@
 // @flow
+/* global SETTINGS:false*/
 import React from "react"
 import * as Sentry from "@sentry/browser"
+import posthog from "posthog-js"
 
 import TopAppBar from "./TopAppBar"
 
@@ -15,7 +17,9 @@ type Props = {
 }
 
 const Header = ({ currentUser, location }: Props) => {
+  let featureFlagUserId = "anonymousUser"
   if (currentUser && currentUser.is_authenticated) {
+    featureFlagUserId = currentUser.id
     Sentry.configureScope(scope => {
       scope.setUser({
         id:       currentUser.id,
@@ -24,12 +28,19 @@ const Header = ({ currentUser, location }: Props) => {
         name:     currentUser.name
       })
     })
+    posthog.identify(currentUser.id, {
+      environment: SETTINGS.environment,
+      user_id:     currentUser.id
+    })
   } else {
     Sentry.configureScope(scope => {
       scope.setUser(null)
     })
   }
-  const showNewDesign = checkFeatureFlag("mitxonline-new-header")
+  const showNewDesign = checkFeatureFlag(
+    "mitxonline-new-header",
+    featureFlagUserId
+  )
   if (showNewDesign) {
     return (
       <React.Fragment>
diff --git a/frontend/public/src/components/ProgramProductDetailEnroll.js b/frontend/public/src/components/ProgramProductDetailEnroll.js
index 70d01abdb8..cfcdbb2af4 100644
--- a/frontend/public/src/components/ProgramProductDetailEnroll.js
+++ b/frontend/public/src/components/ProgramProductDetailEnroll.js
@@ -382,7 +382,10 @@ export class ProgramProductDetailEnroll extends React.Component<
       programEnrollmentsLoading
     } = this.props
 
-    const showNewDesign = checkFeatureFlag("mitxonline-new-product-page")
+    const showNewDesign = checkFeatureFlag(
+      "mitxonline-new-product-page",
+      currentUser && currentUser.id ? currentUser.id : "anonymousUser"
+    )
 
     let enrollment = undefined
 
diff --git a/frontend/public/src/components/UserMenu.js b/frontend/public/src/components/UserMenu.js
index 0cf2080248..96fc16ff99 100644
--- a/frontend/public/src/components/UserMenu.js
+++ b/frontend/public/src/components/UserMenu.js
@@ -42,7 +42,10 @@ const UserMenu = ({ currentUser, useScreenOverlay }: Props) => {
   /* eslint-disable prefer-const */
   let menuChildProps: MenuChildProps
   let dropdownIdentifier = "dropdownMenuButton"
-  const showNewDesign = checkFeatureFlag("mitxonline-new-header")
+  const showNewDesign = checkFeatureFlag(
+    "mitxonline-new-header",
+    currentUser && currentUser.id ? currentUser.id : "anonymousUser"
+  )
   menuChildProps = useScreenOverlay
     ? {
       li:                 overlayListItemProps,
diff --git a/frontend/public/src/containers/ProductDetailEnrollApp.js b/frontend/public/src/containers/ProductDetailEnrollApp.js
index c5d75916f6..1724e0446c 100644
--- a/frontend/public/src/containers/ProductDetailEnrollApp.js
+++ b/frontend/public/src/containers/ProductDetailEnrollApp.js
@@ -30,14 +30,18 @@ const expandExpandBlock = (event: MouseEvent) => {
 
 type Props = {
   courseId: ?string,
-  programId: ?string
+  programId: ?string,
+  userId: ?number
 }
 
 export class ProductDetailEnrollApp extends React.Component<Props> {
   render() {
-    const { courseId, programId } = this.props
+    const { courseId, programId, userId } = this.props
 
-    const showNewDesign = checkFeatureFlag("mitxonline-new-product-page")
+    const showNewDesign = checkFeatureFlag(
+      "mitxonline-new-product-page",
+      userId ? userId : "anonymousUser"
+    )
 
     if (showNewDesign) {
       document.querySelectorAll("a.expand_here_link").forEach(link => {
diff --git a/frontend/public/src/containers/UpsellCardApp.js b/frontend/public/src/containers/UpsellCardApp.js
index 0e2636ea6b..c49257a0a5 100644
--- a/frontend/public/src/containers/UpsellCardApp.js
+++ b/frontend/public/src/containers/UpsellCardApp.js
@@ -110,16 +110,19 @@ export class UpsellCardApp extends React.Component<Props, ProductDetailState> {
   }
 
   render() {
-    const { courseRuns, isLoading } = this.props
+    const { courseRuns, currentUser, isLoading } = this.props
 
     const run = courseRuns ? courseRuns[0] : null
 
-    return !checkFeatureFlag("mitxonline-new-product-page") ? (
+    return !checkFeatureFlag(
+      "mitxonline-new-product-page",
+      currentUser && currentUser.id ? currentUser.id : "anonymousUser"
+    ) ? (
       // $FlowFixMe: isLoading null or undefined
-      <Loader isLoading={isLoading}>
-        {run ? this.renderUpgradeEnrollmentDialog(run) : null}
-      </Loader>
-    ) : null
+        <Loader isLoading={isLoading}>
+          {run ? this.renderUpgradeEnrollmentDialog(run) : null}
+        </Loader>
+      ) : null
   }
 }
 
diff --git a/frontend/public/src/entry/header.js b/frontend/public/src/entry/header.js
index ae923672b2..d9928d0c52 100644
--- a/frontend/public/src/entry/header.js
+++ b/frontend/public/src/entry/header.js
@@ -39,11 +39,21 @@ const renderHeader = () => {
   )
 }
 
-const renderEnrollSection = (courseId, programId, element, reduxStore) => {
+const renderEnrollSection = (
+  courseId,
+  programId,
+  userId,
+  element,
+  reduxStore
+) => {
   ReactDOM.render(
     <AppContainer>
       <Provider store={reduxStore}>
-        <ProductDetailEnrollApp courseId={courseId} programId={programId} />
+        <ProductDetailEnrollApp
+          courseId={courseId}
+          programId={programId}
+          userId={userId}
+        />
       </Provider>
     </AppContainer>,
     element
@@ -68,13 +78,16 @@ document.addEventListener("DOMContentLoaded", function() {
   const upsellCardEl = document.getElementById("upsellCard")
   const courseIdEl = document.getElementById("courseId")
   const programIdEl = document.getElementById("programId")
+  const userIdEl = document.getElementById("userId")
   if (enrollSectionEl && (programIdEl || courseIdEl)) {
     const productDetailStore = configureStore()
     const courseId = courseIdEl ? courseIdEl.value : undefined
     const programId = programIdEl ? programIdEl.value : undefined
+    const userId = userIdEl ? userIdEl.value : undefined
     renderEnrollSection(
       courseId,
       programId,
+      userId,
       enrollSectionEl,
       productDetailStore
     )
diff --git a/frontend/public/src/lib/util.js b/frontend/public/src/lib/util.js
index ca6e059e99..59df80430d 100644
--- a/frontend/public/src/lib/util.js
+++ b/frontend/public/src/lib/util.js
@@ -262,12 +262,16 @@ export const getFlexiblePriceForProduct = (product: Product) => {
 
 export const intCheckFeatureFlag = (
   flag: string,
+  uniqueID: string | number,
   document: Object,
   settings: Object
 ) => {
   const params = new URLSearchParams(document.location.search)
   if (SETTINGS.posthog_api_host) {
-    posthog.setPersonPropertiesForFlags({ environment: SETTINGS.environment })
+    posthog.setPersonPropertiesForFlags({
+      environment: SETTINGS.environment,
+      user_id:     uniqueID
+    })
   }
   return (
     (SETTINGS.posthog_api_host && posthog.isFeatureEnabled(flag)) ||
@@ -276,6 +280,6 @@ export const intCheckFeatureFlag = (
   )
 }
 
-export const checkFeatureFlag = (flag: string) => {
-  return intCheckFeatureFlag(flag, document, SETTINGS)
+export const checkFeatureFlag = (flag: string, uniqueID: string | number) => {
+  return intCheckFeatureFlag(flag, uniqueID, document, SETTINGS)
 }
diff --git a/frontend/public/src/lib/util_test.js b/frontend/public/src/lib/util_test.js
index 4f4156169e..ab348f8223 100644
--- a/frontend/public/src/lib/util_test.js
+++ b/frontend/public/src/lib/util_test.js
@@ -319,9 +319,20 @@ describe("utility functions", () => {
     }
 
     it("returns the flag setting if the feature flag is set", () => {
-      assert.isTrue(intCheckFeatureFlag("test_flag", document, SETTINGS))
-      assert.isFalse(intCheckFeatureFlag("other_test_flag", document, SETTINGS))
-      assert.isTrue(intCheckFeatureFlag("flagtwo", document, SETTINGS))
+      assert.isTrue(
+        intCheckFeatureFlag("test_flag", "anonymousUser", document, SETTINGS)
+      )
+      assert.isFalse(
+        intCheckFeatureFlag(
+          "other_test_flag",
+          "anonymousUser",
+          document,
+          SETTINGS
+        )
+      )
+      assert.isTrue(
+        intCheckFeatureFlag("flagtwo", "anonymousUser", document, SETTINGS)
+      )
     })
   })
 })
diff --git a/main/features.py b/main/features.py
index 8c576c73d7..1ce2ee810d 100644
--- a/main/features.py
+++ b/main/features.py
@@ -1,5 +1,6 @@
 """MITxOnline feature flags"""
 import os
+import uuid
 from functools import wraps
 
 from django.conf import settings
@@ -35,13 +36,15 @@ def is_enabled(name, default=None, unique_id=settings.HOSTNAME):
         import posthog
     else:
         posthog = None
-
     return (
         posthog
-        and posthog.feature_enabled(
+        and posthog.get_feature_flag(
             name,
             unique_id,
-            person_properties={"environment": settings.ENVIRONMENT},
+            person_properties={
+                "environment": settings.ENVIRONMENT,
+                "user_id": unique_id,
+            },
         )
     ) or settings.FEATURES.get(name, default or settings.FEATURES_DEFAULT)
 
diff --git a/main/views.py b/main/views.py
index e30ad5db26..507c336b2d 100644
--- a/main/views.py
+++ b/main/views.py
@@ -11,16 +11,22 @@
 from rest_framework.pagination import LimitOffsetPagination
 from main import features
 
-from main.features import is_enabled
-
 
 def get_base_context(request):
     """
     Returns the template context key/values needed for the base template and all templates that extend it
     """
     context = {
-        "new_design": features.is_enabled(features.ENABLE_NEW_DESIGN, False),
-        "new_footer": features.is_enabled(features.ENABLE_NEW_FOOTER, False),
+        "new_design": features.is_enabled(
+            features.ENABLE_NEW_DESIGN,
+            False,
+            request.user.id if request.user.is_authenticated else "anonymousUser",
+        ),
+        "new_footer": features.is_enabled(
+            features.ENABLE_NEW_FOOTER,
+            False,
+            request.user.id if request.user.is_authenticated else "anonymousUser",
+        ),
     }
 
     if settings.GOOGLE_DOMAIN_VERIFICATION_TAG_VALUE:
@@ -44,7 +50,11 @@ def catalog(request, **kwargs):
     """
     The catalog view.
     """
-    if features.is_enabled(features.ENABLE_NEW_DESIGN):
+    if features.is_enabled(
+        features.ENABLE_NEW_DESIGN,
+        False,
+        request.user.id if request.user.is_authenticated else "anonymousUser",
+    ):
         context = get_base_context(request)
         return render(request, "index.html", context=context)
     return handler404(request, Exception)