It's just another thing they buy thinking it will become something for them when it really it won't. Like the Gym membership they never use, or the exercise machine that collects dust. For a very few people, it is actually really nice to have and you can lose weight using it as a tool but that requires using it intelligently and properly. We all know fats love to lie and always lie about their food intake. So it's no surprise the average person using a fit-bit gains using it instead of losing. They don't track their intake properly, falsify activity levels, and so forth. It pisses me off. It gives the company and the entire premise such a bad rep/association. There are people like me, who using it as a convenient tool, actually lost weight. As a tool it helped me become more accurate with keeping track of what I eat. It has a very large data-base (that is mostly accurate) all at my finger tips. The device itself actually appears to have been pretty reasonable with tracking my energy output(always used one with a built in heart rate monitor). I digress.I went from a BMI of 27-28  to 25 using a free app via an old phone for tracking cals, and activity levels. I switched to using Fitbit as my tool, and went from 25 to 20 bmi. Still currently at 20, with the goal to reduce down to a 19 and maintain there. I love my fit bit, and hate the fatties who use them with no intention of  being serious with losing weight.