Used for boiling water only twice. I didn't use it for simmering, so the pot itself is clean, but while washing it, the pot hit the edge of the sink, causing a 1cm vertical dent in one place on the lower part. However, it's right at the curve towards the bottom of the pot, so it's not very noticeable, and there's no problem using it. Also, there are some minor scratches on the bottom of the pot from the trivet.