diff --git a/lib/plausible_web/controllers/auth_controller.ex b/lib/plausible_web/controllers/auth_controller.ex
index d1c22ac5a9e51dbccf11ac39d346c4282d3a03a2..6a239399416c9d7732c65575da543c29a88d5ba1 100644
--- a/lib/plausible_web/controllers/auth_controller.ex
+++ b/lib/plausible_web/controllers/auth_controller.ex
@@ -545,7 +545,7 @@ defmodule PlausibleWeb.AuthController do
       "import" ->
         redirect(conn,
           to:
-            Routes.site_path(conn, :import_from_google_form, site.domain,
+            Routes.site_path(conn, :import_from_google_view_id_form, site.domain,
               access_token: res["access_token"]
             )
         )
diff --git a/lib/plausible_web/controllers/site_controller.ex b/lib/plausible_web/controllers/site_controller.ex
index 21d92ccc0739c8e0ab160de382172d38cf9a3feb..728e835f46fb52a467892f5a0f5a963d03d5f7dd 100644
--- a/lib/plausible_web/controllers/site_controller.ex
+++ b/lib/plausible_web/controllers/site_controller.ex
@@ -638,14 +638,30 @@ defmodule PlausibleWeb.SiteController do
     |> redirect(to: "/#{URI.encode_www_form(site.domain)}/settings/general")
   end
 
-  def import_from_google_form(conn, %{"access_token" => access_token}) do
+  def import_from_google_user_metric_notice(conn, %{
+        "view_id" => view_id,
+        "access_token" => access_token
+      }) do
+    site = conn.assigns[:site]
+
+    conn
+    |> assign(:skip_plausible_tracking, true)
+    |> render("import_from_google_user_metric_form.html",
+      site: site,
+      view_id: view_id,
+      access_token: access_token,
+      layout: {PlausibleWeb.LayoutView, "focus.html"}
+    )
+  end
+
+  def import_from_google_view_id_form(conn, %{"access_token" => access_token}) do
     site = conn.assigns[:site]
 
     view_ids = Plausible.Google.Api.get_analytics_view_ids(access_token)
 
     conn
     |> assign(:skip_plausible_tracking, true)
-    |> render("import_from_google.html",
+    |> render("import_from_google_view_id_form.html",
       access_token: access_token,
       site: site,
       view_ids: view_ids,
@@ -653,16 +669,32 @@ defmodule PlausibleWeb.SiteController do
     )
   end
 
+  # see https://stackoverflow.com/a/57416769
+  @google_analytics_new_user_metric_date ~D[2016-08-24]
   def import_from_google_view_id(conn, %{"view_id" => view_id, "access_token" => access_token}) do
     site = conn.assigns[:site]
+    start_date = Plausible.Google.Api.get_analytics_start_date(view_id, access_token)
 
-    redirect(conn,
-      to:
-        Routes.site_path(conn, :import_from_google_confirm, site.domain,
-          view_id: view_id,
-          access_token: access_token
-        )
-    )
+    case start_date do
+      {:ok, date} ->
+        if Timex.before?(date, @google_analytics_new_user_metric_date) do
+          redirect(conn,
+            to:
+              Routes.site_path(conn, :import_from_google_user_metric_notice, site.domain,
+                view_id: view_id,
+                access_token: access_token
+              )
+          )
+        else
+          redirect(conn,
+            to:
+              Routes.site_path(conn, :import_from_google_confirm, site.domain,
+                view_id: view_id,
+                access_token: access_token
+              )
+          )
+        end
+    end
   end
 
   def import_from_google_confirm(conn, %{"access_token" => access_token, "view_id" => view_id}) do
diff --git a/lib/plausible_web/router.ex b/lib/plausible_web/router.ex
index 39f2b77b9288fadeb608dacd98fa441349b578e1..5cfb4f5717220e40797abe37f7790220c8fe7daf 100644
--- a/lib/plausible_web/router.ex
+++ b/lib/plausible_web/router.ex
@@ -238,8 +238,16 @@ defmodule PlausibleWeb.Router do
     delete "/:website", SiteController, :delete_site
     delete "/:website/stats", SiteController, :reset_stats
 
-    get "/:website/import/google-analytics", SiteController, :import_from_google_form
+    get "/:website/import/google-analytics/view-id",
+        SiteController,
+        :import_from_google_view_id_form
+
     post "/:website/import/google-analytics/view-id", SiteController, :import_from_google_view_id
+
+    get "/:website/import/google-analytics/user-metric",
+        SiteController,
+        :import_from_google_user_metric_notice
+
     get "/:website/import/google-analytics/confirm", SiteController, :import_from_google_confirm
     post "/:website/settings/google-import", SiteController, :import_from_google
     delete "/:website/settings/forget-imported", SiteController, :forget_imported
diff --git a/lib/plausible_web/templates/site/import_from_google_user_metric_form.html.eex b/lib/plausible_web/templates/site/import_from_google_user_metric_form.html.eex
new file mode 100644
index 0000000000000000000000000000000000000000..54789c3429857ffb84aa5651142e8c2ff40454dd
--- /dev/null
+++ b/lib/plausible_web/templates/site/import_from_google_user_metric_form.html.eex
@@ -0,0 +1,26 @@
+<div class="max-w-md w-full mx-auto bg-white dark:bg-gray-800 shadow-md rounded px-8 pt-6 pb-8 mb-4 mt-8">;
+  <h2 class="text-xl font-black dark:text-gray-100">Import from Google Analytics</h2>
+
+  <div class="mt-6 text-sm text-gray-500">
+    <p>
+    <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 inline text-orange-600" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
+      <path stroke-linecap="round" stroke-linejoin="round" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z" />
+    </svg>
+
+    Important: Since your GA property includes data from before 23rd August 2016, you have to take an extra step to make sure we can import data smoothly.
+    </p>
+
+    <ol class="mt-4">
+      <li>1. Navigate to the GA property you want to import from</li>
+      <li>2. Go to Admin &gt; Property Settings &gt; User Analysis</li>
+      <li>3. Make sure <i>Enable Users Metric in Reporting</i> is <b>OFF</b></li>
+    </ol>
+
+    <p class="mt-4">
+    The setting may take a few minutes to take effect. If your imported data is showing 0 visitors in unexpected places, it's probably caused by this and you
+    can try importing again later.
+    </p>
+  </div>
+
+  <%= link("Continue ->", to: Routes.site_path(@conn, :import_from_google_confirm, @site.domain, view_id: @view_id, access_token: @access_token), class: "button mt-6") %>
+</div>
diff --git a/lib/plausible_web/templates/site/import_from_google.html.eex b/lib/plausible_web/templates/site/import_from_google_view_id_form.html.eex
similarity index 100%
rename from lib/plausible_web/templates/site/import_from_google.html.eex
rename to lib/plausible_web/templates/site/import_from_google_view_id_form.html.eex