I really love this watch. But there is one thing that drives me nuts. It disconnects and reconnects to the phone all the time.I really like how it tracks my sleep as well as my oxygen levels while I sleep. Keep in mind that this is not as accurate as the oxygen devices that would be used in the hospital or your doctor's office.If you use a lot of the applications on the watch, you will need to recharge it daily. But it charges rather quickly.I have yet to try all of the applications on the watch. The only other thing that I wished it did was show you how many steps you have left to make your goal.Would I invest over $200 again for this watch? Maybe. If not, I would still get a Garmin product.Oh, the size is great. Not like some of the other brands out there that have much bigger faces.