Best "Sleep" feature

WarmDontBurn

I have searched but obviously most trackers people are looking for are HRM, Calorie/Step counters -- I have the Fitbit one and it does track sleep but not sure how well. I mean nights I feel like I lay there for hours it says I fell asleep within minutes.

Great tracker but looking for a more sleep geared tracker.

Anyone have one that seems more accurate for sleep?
The Jawbone UP3 looks good but no clue when it will be available.

Thanks for any advice