I find the rings have been addictive -- to make me want to close them, meaning I get more exercise.
I have my watch face showing the weather, so I look at that pretty often.
And I use it to monitor sleep and record exercises.
I sometimes use it to send a quick text message rather than digging my phone out of my pocket or from the other room.
And having the heart monitor is kinda cool.
AT&T is gonna AT&T. I like T-Mobile because the price they quote is the price.