I have used mybodycomp since I started this WOE, I didnt' have alot to lose to begin with, but my BF has gone down 7% with an 11 pound loss. I agree if you take the measurements and calculate the same place everytime, your still going down from where you started. I had mine done at the gym 1.5 years ago and I know I wasn't anywhere near that shape when I started Atkins, or mybodycomp. I feel it's pretty close, and like I said, it went down and thats all that matters to me. Also, you can't just put your height and weight in there, it calculates off of your body measurements, so if you lose inches and not weight, you will be losing body fat