It looks like the top stone cracked in the 3rd picture from last. This would be my biggest concern. This happened to me when I tried to cook 2 pizzas in my oven at the same time because I had a bunch of people over for a football game and everyone was hungry. I used the convection feature and the top stone cracked from the moisture of the lower pizza. A really loud boom and chunks of stone and pizza fell on the lower pizza ruining everything. Ended up having to order take-out pizza, yuck, not to mention my wife was pissed because the second stone was hers.