I have had this FitBit for only two weeks, but I have already lost 1.8 pounds! I am not doing the diet part of the app. I am just moving more. My favorite feature is that it reminds you to get up and move 250 steps an hour. That simple buzz has increased my step count by an average of 1500 steps a day. I am pretty average in the amount of exercise I do a day, but I have already noticed that I think about moving more.
You can set your own goals, whether steps, weight loss, miles, calories, or others. It hasn't been as hard as I first thought it might be, mainly because the band itself gives you so much encouragement. It does celebratory buzzes and graphics when you reach your hourly goal and when you reach your daily goal. Plus the app has an easy to understand dashboard that also celebrates as you get to each of your daily goals.
Another feature I like is that it tracks your sleep pattern. It tells you not only how much you sleep, but whether it was REM, light, or deep sleep.
It also tracks your heart rate over the day, not only so you know if your exercise is vigorous enough to be cardio, but also things like resting rate and accurate calorie burn.
A couple of things to be aware of. When you first get it, CHARGE it before you try to download the app. I did it the other way and it was quite a hassle. Also it does need to be charged about every five days to a week, unless you always charge it while taking your morning shower. I try to charge it while I am neither active nor asleep - such as when watching television.
At first I had a hard time getting the band to the right tightness. I made it too tight because I was concerned that if it wasn't snug the heart monitor could not read very well. It is like a rubber band and made my hand tingle. But adjusted to a looser (not snug at all) fit, it still works just fine and I notice it as little as I would a bracelet or watch.