I have now bought 3 sets of this oven ware. Both my daughters asked for this for Christmas, after inspecting mine, to replace other sheet pans with non stick coating. We are all trying to purge toxic cookware from our lives. We made dozens of cookies for the Holidays and all the cooking times were perfect. These pans provide durable and functional cooking surfaces and sturdy handles that are lovely to look at. There is no warping of the pan, or over browning of cookies, and the recipes turned out better than usual. These sheet and baking pans are superior and worth the investment. I have some notable name brand cookware, but these are now the preferred brand for 3 families.