I guess that's a copy of the Wild Woodgas Stove? Bought one of these recently - the newer model with wire pan supports.
My first few tries have been a bit mixed. Once you get it going, the wood gas thing does work very well and the stove gives off a good heat. I'd say that, at maximum, heat output is midway between my Whisperlite petrol stove and a trangia burner. That's a solid amount of heat for boiling water.
However, I haven't had a lot of luck in sustaining this level of heat output for more than 10-15mins or so. That's a problem if you want to cook a full meal. You might need at least 20-30 mins of strong heat.
When the wood gas flames do die out, there should still be enough of a heart in the fire to get it going again after adding more wood. I've found that it can take 10 mins or so - and prodigious amounts of smoke - before the new fuel sparks into life.
It's entirely possible that I just need more time to figure out how to get the best out of this stove but my first impression is that it's going to take a lot of patience to do anything more complicated than boil a cup or two of water. I could be wrong.
One huge plus is the stove's efficiency. You only need a couple of handfuls of twigs to fill it up and that makes foraging for fuel very easy. A pair of lightweight (anvil) secateurs might be worth considering. At the very least you'll probably want to carry a lightweight pruning saw and basic knife like a Mora Classic/Companion/etc so you can process some larger 2" or 3" logs. In wet weather, that might be the only way to obtain some dry wood.
