Well, it looks like Ava is not for me after all. I had them send me a replacement bracelet after I was being tortured during the night with random vibrations/restarting of the bracelet. Not only was it ruining my sleep, but it was giving me bad information since the "sleep" was not sufficient. Last night, with the new bracelet, it woke me up at least 3 times, which is the most I ever caught. Am I thrashing in my sleep? Am I a secret sleepwalker? I don't know, but Ava is not for me. I have Ovusense coming in the mail and I hope this will work better. I had the original Ava bracelet and it was fine. Then they updated it with this silly vibration and now I can't use it.