I sure wish Samsung would come up with a software update for the Galaxy Fit2 to fix the sleep tracker. It is basically useless, as when it DOES work, it doesn't do a very good job of it. And sometimes it doesn't track at all, or only tracks a few hours, starting at some random time after I've already been asleep for several hours. PLEASE come up with a fix for this!!!!! From what I've read online, I'm not the only one that has had this experience with it. Other than that, I am very happy with it, but I really wanted to be able to utilize the sleep tracking feature!