It is a little over a week I wear so here's my take on this new product trend. The bracelet is very light and very pleasant to the wrist, the screen is perfectly integrated there. First of all you need to recharge the bracelet a few hours before use. For that one has a USB charger to connect to a computer or to a USB port if you have one. Then you need to download the application on your mobile phone with Android or IOS and to sync via Bluetooth. Once connected, you no longer have to think about it, it will count your steps performed on a day, distance traveled and calories burned. It will put in sleep mode so that it counts the number of hours of sleep. The watch will also send you all the notifications you receive on your phone, for example Facebook, SMS, ... I had to recharge it after 6 days of use.
In general, I think the bracelet rather well. However I have some comments as to the relevance of the information. I do not understand how calories are calculated? How could I burn 6000 calories 11km? When I run 10km, I burn at around 600/650 calories and it is rather reliable ... Then I find imprecise sleep mode because it is active when you want to sleep, it does not mean that one will fall asleep immediately.