Purchased sight unscene. Heavier grates than the Kitchenaid this replaces are less likely to crack when abused. Great performance for my cooking needs. Knobs have LED lighting in them that lights up the bottom of the knob when turned on. Could be a safety features when the mother-in-law leaves a burner on. Disappointed in the knob markings. They are painted on to the stainless steel. No etching, raised or embossed markings. How long will they stand up to regular cleaning? I imagine not long with regular cleaning.