Bests & Worsts Reviews from Amazon

I used it side-by-side with my mechanical balance scale (like the one in Doctor's office). My scale isn't perfect, but it is consistent (i.e., given the same weight, it gives the same reading). This scale is NOT consistent. I tried several calibration cycles, on different flat surfaces, and I still experienced two things: 1) my weight with and without pajamas (which weigh 9oz, or more than 1/2 lb), was the same. And the difference between the mechanical scale and the digital scale varied by 2-3 pounds from day to day. (so 160 lb on the mechanical scale was 162 on the digital scale on Monday, but it was 163 on the digital scale on Tuesday). I contacted customer service. They said this was expected behavior. They said their scale was not expected to distinguish a 1/2 lb difference correctly, and that reading-to-reading it could vary +/- 1%. For 160 lbs that's a range of 3.2lbs. I can't see how this is useful for anyone.