The app is a fun and free chance to play chess with other players. That said, I have a few criticisms.
First, if you don’t have Facebook, you’re kind of out of luck in terms of changing details, like a picture, on your gamer profile. Second, the app corrupts a lot of games. I’ve had more than a couple corrupted, which was a bummer because I was off to a great start. Third, the app, at least mine, freezes often. Fourth, the help buttons in the app are not helpful. Fifth, the chat feature is cemented to a specific game. So, if you close/clear the game from your history, you have no way of reading or replying to a message.
So, fun, free, and simple, but you do have these issues to work around. Just wish they would actually take the time to work out these kinks.