I wanted it to track my sleep and I'm a bit disappointed in the way it records it. I guess I'm spoiled by my Fitbit which showed my sleep patterns in increments throughout the night rather than just telling me how much good sleep or bad sleep I had like this one does. However, given the price and the fact that I can again count my steps I am basically happy with the purchase.
Very comfortable to wear. A little sensitive on the counter, said I took 30 steps while driving home. Seems to be based more on how much you move your arm than your legs. The sleep detector is good & seems more accurate. Just need to remember that the step counter will be slightly higher than true step count.