I've used (a) the Beddit touch-sensitive mat, (b) the Fitbit watch, and (c) the Oura ring. Beddit claimed I never slept more than 2 hours a night, which was so

I've used (a) the Beddit touch-sensitive mat, (b) the Fitbit watch, and (c) the Oura ring. Beddit claimed I never slept more than 2 hours a night, which was something of an exaggeration. Fitbit was better, but I still caught it a couple of times claiming that I was asleep when I was actually lying awake reading for an hour. I've been using the Oura ring for maybe 6 months and I haven't caught it in any known mistakes so far; there was one weird thing where if you had multiple sleep periods separated by several hours, it'd show only one of them in the cloud view, but I've not hit that recently. I would recommend the Oura ring with few reservations.