We purchased the Dough Joe steel a year ago and couldn't be happier. We got the 3/8 inch thick (it measures 15 inches square) and the Amazon price is $59. We preheat the oven with the steel in it for close to an hour. Our max temp on the dial is 500 degrees. I certainly don't feel like I should have gotten the 1/2 inch thick. We like a thin crispy crust with a little char on the bottom, and this works like a charm.
Oh, it cooks about 7 or 8 minutes.