My customers love this feature and so do I!

For the one who are still not on 1602 level, check this out :

http://blogs.technet.com/b/manageabilityguys/archive/2016/03/29/what-39-s-new-with-configmgr-39-s-client-notification-feature.aspx

this is really a great feature, where you can very quickly from the console check out which machines are turned on or off and quickly be able to manage them!