Been using fitbit for over 2 years now (~ 7.5Million steps logged). Have the data being pushed to other web apps (MyFitnessPal, FitStudio, Higi, Acheivemint, Walgreens balance rewards). Also, trained up and ran 2 half-marathons in this time. Lost 60lbs so far, first 20lbs was from increased walking and diligent choices via calorie logging in MyFitnessPal. Fitbit is not the be all end all, but it definitely keeps me aware.