I wonder, would you still say they're accurate after 2 years? I've just bought them and tested them against my other scales which gave inconsistent readings. The first time I put a test object on it, it gave it a weight 1 kg heavier than the old scales. I then moved it around and checked again and it shifted down to close to the other scales' reading. It continued to move up and down by about 100g (which I know is the claimed accuracy threhold so not a real criticism per se). I'd just like to know whether I can trust these scales.
My floors are wood and tiles and look pretty flat! ...In fact I've just checked and the wood floors are reasonably flat, not perfect but I doubt any normal household floor is, and the tiles in the bathroom are even more so. So there goes the only explanation I could think of.