Possessing the flex Fitbit and having had many problems with (3 return SAV), I tried to replace it, if possible by another brand. However, the important criterion for me being the vibrator I finally turned to the newest Fitbit namely the load. After a week of use here are my first impression: Very good battery life (held four days without having recharge after receipt charged battery has half), very effective even more than the vibrator flex. Information super load screen and avoids synchronizing with the smartphone. The automatic sleep function works rather well and it is now more necessary to do it manually. The function gadget but ultimately very nice is the vibration of the bracelet with the number of the caller when someone called you on your smartphone. However negative I will that the bracelet can not be replaced, which will be inconvenient when it has several scuff marks and scratches on the plastic screen. Otherwise all good.
