I have one. It's a great stove. I have used it for wood fires and as a windscreen/pot_support for a Tangia burner. Functionally and mechanically it is top notch. Absolutely fantastic.
It is super heavy duty. Meaning "heavy". I would not consider it a backpacking stove, more of an emergency preparedness BOB stove or car-camping stove. It does fold up small and flat, it just weights a lot. But if you're using small sticks found on the trail for fuel, some of it's weight is offset by not needing to carry fuel in a seperate bottle or cannister. It is not flimsy at all, it is very solid and well designed.
http://foldingfirebox.com/