Years ago I had a Fitbit Surge, an awfully ugly gps watch. But everything about it worked as one would expect. Especially the sleep tracking. Our three year old granddaughter would get out of bed every night and come get in bed with my wife and me. The next day I could look at the graph and I could easily see exactly what time she came in and every time she kicked me in the back. My Garmin Vivoactive 3 had sleep tracking but not near as good as the Fitbit device.