I have been using this band from the very 1st day of this year. This works fine for your daily steps you walked, it maintains your sleep data, how many times you sleep in deep sleep mode, tells you light sleep mode, and tell you how many times you wake during the night. The following parameters will help you to buy it.
Durability : 4.5 out of 5
Water resistant test : 4 out of 5
Data maintened : 4.5 out of 5
Basically it’s very good gadget, especially it tells you how many calories you burns in a day, weeks, months.