Hot rocks pizza oven

1

I was wondering if anybody has any experience with these ovens? A few months ago I was training with a guy out in Detroit who was doing some consulting work for a pizzeria that was using these and he said they were making some stellar pies and that he was thinking of swapping his deck ovens out for them. Since then I have been looking a bit into the and they seem really interesting to me. So, anyone use or know someone that uses one?