It will not bring you more than the application 'RunKeeper ... It will bring you less ... For roughly ... The number of steps per day is always the same ... Your sleep is + approximate ... And it really does not report.
It's too big ... Not nice wrist and quickly clog. It is not very accurate.
In short, I do not recommend it.
For sports: Some apps like 'RunKeeper' works better and go away +.
To not do sports: What is a bracelet that tells you that you do not walk enough ... It is torture.