Am disappointed with this product. I would have thought the quality would be better. As a professional chef (retired), I was not happy with the quality in that the first time I used it to cook pasta, I was disappointed that after washing it medium to dime spots were visible in the bottom of the Pan. Will not "disappear" even after using a mild scrub such as liquid comet. Won't return the product since it does not affect the cooking outcome. Just irritating