I place it on the very bottom rack. Then pre-heat at max, which is approx. 525 for roughly 1 1/2 hours sometimes longer, no broiler. I have owned several stones and all of them have cracked on me. I bought 1 particular stone from a shop in the Allen Outlet mall and it broke on me, then they replaced it with another of the same, that cracked. I took it back, got store credit, and bought the Mario Batali pizza pan. Back then it was around the $50 range. I have seen the price increase, but it is worth it. I bake all of my bread on it as well. Fantastic pan for what I use it for.