So I live with two family members, and we all weigh ourselves with this scale. The weight measurement works fine, afaik.
However, the other metrics such as body fat, etc. Do not. It’s never shown anything for my mom (93). My sisters seems to work (it didn’t for the first several weeks), but it keeps displaying a message about other users with similar weights, and won’t display our bmi, etc. We are 123, 125, and 132lbs.
It “used” to work for me (the primary user), but no longer.
I’ve tried cleaning it. I don’t know the return window, but I hope they fix their 
! I have almost all their other products and love them.