I've had my active 2 since Christmas and it is really terrible at tracking and recording sleep. I'm not a great sleeper and I don't expect the watch to solve this, but I did expect it to track what sleep I do get. About twice a week I will get sleep activity, the rest of the time I get a were you sleeping message. I've tried putting goodnight mode on, loosening and tightening the strap, putting the watch in different locations on my wrist but nothing works. It's very frustrating especially as the watch was not cheap and does claim to track sleep. Perhaps Samsung need to amend their advertising and adjust the price accordingly. This feature was one reason I bought the watch.
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