Dont update to latest iOS version...
...if you use the app to send pics and video. After the update, all attempts to send pics/gifs/vids is met with an immediate "Failed to send" error. This was my favorite way to stay connected with my gmail contacts but sadly now it is obsolete without that function and I wish I had never done the update.
I can still send messages and do video calls, otherwise I would rate it no stars :(
ukade about
Hangouts, v17.0.0