I cannot find much searching the innerwebs except posts about various meats or dishes prepared in the style. I would really like to see pictures. From what I have seen, it seems that the style is much like cooking over a campfire except the fire is in a firebox and there is a grill over it and sometimes the grill height can be changed to either lower or raise the cooking surface.
Searching here didn't turn up pics or a verbal description for me. If I missed it, I apologize in advance.