I am very enthusiastic about the bracelet. It is very easy and also for watches objectors as comfortable to wear me. The OLED display is very easy to read. The collected data are fairly accurate. However, it must know that steps is a unit of activity. How he will track and accurately measures can be found on the homepage. The beginning and end of sleep, he sometimes does not recognize exactly. But is also impossible when I sit motionless on the couch or bed. But you can edit the times subsequently. The battery is excellent. After the first charge he held by a whole 10 days and was still not completely empty. According to the manufacturer it is 7 days. While the bracelet worn belongings around the clock. Perfect. The app is very good and the website also. Everything is easy to use. The food database is ok. One or the other is missing. After some time but has everything you could need either in the database or entered yourself. If the bracelet buy again at any time.