Update README
diff --git a/examples/pubsub/README b/examples/pubsub/README
index b55083a..faeb622 100644
--- a/examples/pubsub/README
+++ b/examples/pubsub/README
@@ -1,3 +1,6 @@
+Experimental example code, likely to change.
+Users should not attempt to run this code till this warning is removed.
+
C++ Client implementation for Cloud Pub/Sub service
(https://developers.google.com/apis-explorer/#p/pubsub/v1beta1/).
@@ -12,19 +15,7 @@
gcloud compute instances create instance-name
--image debian-7 --scopes https://www.googleapis.com/auth/cloud-platform
-Google TLS cert is required to run the client, which can be downloaded from
-Chrome browser.
-
-To run the client from GCE:
-make pubsub_client
-GRPC_DEFAULT_SSL_ROOTS_FILE_PATH="Google TLS cert" bins/opt/pubsub_client
- --project_id="your project id"
-
-A service account credential is required to run the client from other
-environments, which can be generated as a JSON key file from
-https://console.developers.google.com/project/. To run the client with a service
-account credential:
-GRPC_DEFAULT_SSL_ROOTS_FILE_PATH="Google TLS cert" bins/opt/pubsub_client
- --project_id="your project id"
- --service_account_key_file="absolute path to the JSON key file"
+To run the client:
+make pubsub_client
+bins/opt/pubsub_client --project_id="your project id"