I'm impressed with this watch. Love the design and the bright screen. Buttons are easy to get at, functionality is great, and easy to use. Tested accuracy against medical heart rate and blood oxygen, the watch was within a beat or two. Works with phone I'm not a professional athlete, but I do enjoy a good looking, well built, functional watch that makes my life I little more enjoyable. I'm getting about two and a half days between charges with moderate use and AOD. Got sport band metal bands. Th...