The sleep stats on the 945 are way off every night!! It shows me sleeping when I'm not sleeping, and never shows an deep sleep. It usually says I slept 10 to 12 hours which I don't ever do. I used to have the 920xt and that seemed to get much more accurate sleep stats. Now I just ignore that metric, please fix it!!!
UPDATE: It has been working correctly now. I'm not sure what happened but the numbers now are very accurate and the sleep score is very helpful!