The SleepTracker watch has been a total success from what I can divine. We actually called to get one in for review because so many people were asking about it and the company said they didn't have a single review unit to spare (I probably should have turned off Unskinny Bop while calling). Gear Live has an interview with Lee Loree, the inventor of the watch that helps you wake up at the optimal time.
The next night I allowed our dog back into our room. 3 times she woke me to where I sat up in bed and was visibly disturbed (I video tape the nights I run tests).Kinky, but that's science for you.