They have the tendency to develop a heat tint (blue stains in the pan) but a spritz of vinegar and rub with a paper towel will quickly remove it.

The construction is good quality, but their performance is abysmal. Really disappointing. Will be buying a new, different brand.

Cooking is very uneven. These pots are worthless after a week or so. They say not to use any cooking spray or oil for these, but dont work well without that.

The pans feel scummy and sticky and the lids are always cloudy. The small skillet has a coating from cooking oil that cannot be removed. The large frying pan gets hot too quickly.

Have ruined soooo many meals with the beveled pans though. I dislike the sharp edges at the end of the pan handles.