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I had both generations of Oura. It was good for duration and temp, very bad for stages or if I was awake I middle of night. I have had much better results w Dreem headband. It uses eeg and some other sensors. It’s more expensive though. (25 off YBVYPYSYY). It also has a sound it plays during deep sleep to help extend it. I haven’t experimented with it yet to verify that it makes a difference.

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