Didn't have any issues till newest update. At the moment the basic functionality of the watch is broken. Got myself Galaxy Fit2 mostly to control my sleep pattern. Before update band was vibrating like crazy for alarm clock till you did something with it - would wake you up for sure! Now after less than a minute band is turning off? And with no snooze! Can't even set it up after band stop trying to wake you up. Since newest update I was not woke up by band even once!