From what I can see, there is no charcoal or wood involved in using this box.
Other than being outside, how would it be any different than using your oven in the kitchen?
James, not sure what the box costs, but try making some pizza on your kettle, sometimes it takes more than a few tries to get it right,
but when you do, you probably will not want the pizza box any longer. Give it a try, just need a decent stone, c'mon, you know you want to. ;-).
From what I can see, there is no charcoal or wood involved in using this box.
Other than being outside, how would it be any different than using your oven in the kitchen?