I have one. I am not certain it has done much to improve my sleep exactly but I am aware of what my patterns are. I like that I can see when and how long I was

I have one. I am not certain it has done much to improve my sleep exactly but I am aware of what my patterns are. I like that I can see when and how long I was in "deep" sleep or at least what the rings thinks is deep sleep. I can usually correlate that when I do not get much deep sleep I am more tired the next day. I like that I can get a resting heart rate at night. It also takes your temp (somehow). So each day once it syncs I look at resting heart rate and temp for last night. I got one more than 2 years ago. It eventually died about 2 months ago. I was well passed their warranty so I insta-bought another without a thought. So in short I think it is a good product. I cannot think of a way to improve it honestly.