Gotham Steel Cooking Baking Sheet

I bought two of these nonstick cookie/baking sheets solely because they were not supposed to warp. I used both tray the first time a few days ago at 425 degrees and no issues. Today I pre-heated the Oven to 375 degrees to bake French fries and two pork loins, and after I placed both trays in the Oven I heard a very, very loud banging sound. I opened the Oven door and you can see from the picture that the top tray warped drastically.................so much for Non-Warping!!!!! If I had been cooking something that would run/slide, it would have run off the lower side after the warp took place. To be fair, after the pans cooled down the warp straightened out and the pan was flat again. Unfortunately, due to my knowledge of metals, once something warps it will continue to warp in the future when under temperature. Non-Sticking works as advertised, but the Warping Issue is why I posted such a low score. If it didn't warp I would have rated this product 5 stars.