I bought this because I love my Hestan cookware and I got tired of my aluminum sheet pans warping at higher temperatures. These Ovenbond sheet pans are beautiful enough to use as a serving platter, but bulletproof from a performance standpoint. Aluminum core, but clad like high-end cookware, they won't warp, they are extremely heavy duty in their construction, and they are dishwasher safe to boot. Of course, they cost more than aluminum sheet pans but how many of those have you had to replace due to warping, scratching, discoloration, or stubborn food that got stuck? Sure they're recyclable but it still feels wasteful to me. Buy these once and use forever.