After 3 months of use, I find this great gadget. You can synchronize when you want, you are not obliged to have permanently your phone with you. The small screen is very useful. Very good water resistance. We really forget. The user interface is very good, best in web version. Damage, however for sleep analysis that is not yet very advanced. The bonus for each day is a challenge, the community challenge that boosts you! Your turn to play!
