Does it work? I think it works well enough to be our main camping stove but it does not do quite what I wanted it to. When we went on our Scottish trip in the spring we were worried about whether we would find enough dry firewood so we took a carrier bag full of offcuts just in case. This worked so well that we hardly bothered to gather firewood and even so we did not use the whole bag. For the Bala meet I had neglected to replenish the cheating bag and was obliged to go and find fuel. It was a bit damp, cutting it into short lengths was a nuisance and it did not burn anywhere near as well as gunwale offcuts, so I think the key to happy use of the stove may be to prepare the fuel in advance of the trip; it's not as bad as taking expensive fossil fuel in a tin.
When you burn wood gas what you are left with is charcoal, which will also burn in the stove, but if you extinguish it (not by pouring water in the stove as it will get in the fan) you can grind it up and scatter it about. It will do no harm and will not turn into CO2 so it can be your very own bit of, totally insignificant, carbon sequestration.
Sailing Without Pain Or Strain (JanP)