I believe my fitbit is pretty accurate. I know after each round of golf I seem to get a pretty similar number, about 6 to 7 miles, and if you look up online how long you walk when you play a typical round of golf It seems about right. One time walking down a long indoor hallway I counted my steps up to 200 and my fitbit had exactly 200. . When I am on a road trip and even though i move my hand a lot with the radio and seat controls, biting my nails, it still vibrates and "reminds" me to get up and move around every hour. Now I do not take my fitbit as gospel, but I believe it provides relativity to everyone and how "active" I am compared to other users.