I have used the same scale for years. I thought maybe it was a little off (it seemed about 3 or 4 lbs off compared to WW), but I had always used it as my guide, so I wasn't worried. My brother gave me his scale and I was excited because it goes to 330 and although I didn't need it, it was a nice feature to have. I get on the thing and it weighs almost 9 lbs heavier than mine.
It's so wierd, if I put my 16 lb weights on them, they both say 16. But if I get on one and then get on the next, almost 9 lbs difference. DH saw a 4 or 5 lb difference, so I am thinking that my old one must get less accurate with more weight. I will be up (alot!) on Monday due to vacation, but I am just sick over having to add 8 or 9 lbs due to the more accurate scale.
I'd love to ignore it and use my old one, but now I just don't think it's right.