Zaug Stoves

has anyone come across these Zaug rocket stoves? I wonder how long this unit would last? it has a 3/8" steel chamber 7-3/8" square and a 12g a painted steel jacket on it. I just found them and thought it interesting that they were being manufactured and sold.

http://www.zaugstoves.com/wordpress/specs/

So there is one problem with the Zaug Stoves... Their shop got crushed about 4 years ago by a windstorm. So they are no longer in business. They also were weeks from getting their EPA cert then a wind storm all but ended the business. Sad days. I've been VERY interested in them as well as you can guess.