First, I never wash my baking sheets in the dishwasher. They will ALL rust. I always wash them by hand. This is the best, durable baking sheet I've ever owned and nothing sticks to them! They wash up easy with warm soap and water. I love them so much I now own 3!
While out of town I bought this cookie pan to make our favorite chocolate chip cookies, I couldn't believe the difference a cookie pan could make, better than ever. The cookies had crisper edges and bottom than I get with my usual pans. I was very pleased with the difference, and will buy more of these pans to have at home. The person who had a problem with rust, this is not an unusual problem for metal bakeware, after washing just put it in the oven so it can dry out completely, as long as you don't soak or wash it in the dishwasher, it probably won't be a problem.