I like my steel too... custom cut, round , cold rolled steel , from a local steel supplier, delivered to my door. Won't ever crack that's for sure... but not exactly cheap either. Mine is 15" diameter, could have had a 15x15" square for the same price, since they effectively just cut the corners off to make mine round. Cheaper then a hunk of steel sold as a baking steel, but not as cheap as un-glazed tile...
Some say steel cooks better... but from what I know, how well something cooks is subject to some personal bias... also depends on how your using it... or how much heat you have on top, vs how much is coming from the bottom. I could cook on either, but prefer the steel just because of it's durability.