Get real. No cheating here. Move along. Nothing to see. If concerned, roll real dice for a while already.
Excellent, mostly-intuitive user interface. Unobtrusive hints option. Very responsive support by email.
NJ is my favorite iPhone BG app, and Ive tried a dozen of them. Only "XG Mobile Backgammon" has a stronger AI.
Turn-based network play use of GameCenter is awkward. Sometimes wont see other-player moves until phone reboot. For PvP network games, chat could be much better. Can now only send message when is your turn, only see other player stats before match starts. A bit tricky moving to next-available game. Most online games allow chats and stats check any time. Fix these for another star.
Cheating accusations against strong backgammon programs are widespread. See also (www dot aifactory dot co dot uk/backgammon dot htm) for discussion of the issue.
Author works hard to explain how you can test for cheating, yet none of the whiners take the time to try them. Just based on their superior skill and experience, it "feels" wrong. Yes, some rolls are surprising and seem to favor the machine. Others not so much, but that doesnt prove cheating.