I have the gray smooth cooktop. It's a Maytag, bought at Sears. I will never buy another Maytag or anything from Sears again. I was assured the top would not have black marks, rings or discloration that would be permanent from cooking no matter what pot was used. . Ha, black marks appeared and are permanent. Maytag said the marks did not effect the workings of the stove so wouldn't honor the warranty, Sears wouldn't honor the in store warranty because it was cosmetic. The sales person even denied saying I would never have to worry about black marks. We have since bought all new appliances even washer and dryer and never set foot in a Sears store or never gave Maytag products a glance. I tell my warranty story when I see anyone looking at Maytag products.