My friends and I have bought dozens of Hartstone Baking Stone Products. They are wonderful to cook in! Clean up is easy with soap and water, or they can go in the dishwasher! You can't use soap on Pampered Chef stones! Plus, food doesn't stick to them like it does on Pampered Chef! I called the company and found out that Hartstone baking stones are now fired at 2200 degrees, so they can go from freezer to oven without breaking! We highly recommend the Hartstone line of baking stones! This is an American company run by Americans! Yeah!