Yup, I have one of those. There was a thread about it floating somewhere, not sure if it's still up.
Basically it's a slightly heavy but rather clever box, quite stable and good when the fire gets going. I found that it works better to get things lit before putting the fire in the box in still conditions, or else the flame tends to sputter and suffocate. The main potential problem is the slightly cranky hinge design, which requires careful folding. Ultimately I'd say that these are not essential - you can make your own hobo stove out of a tin, after all - but I'm happy enough with mine.