I've got a civvy turboflame, and when they work they're very good; quite a few seem to have ignition problems though. Turn upside down and use a small screwdriver of the tip of a knife to press in on the fuelling valve; you'll hear the hiss as trapped air escapes. Keep going until the hissing stops. Then refuel with decent gas; Swan is good. Leave for at least two minutes before lighting. Doing this whenever it gets low, I've never had problems with the piezoelectric system, and the fuel lasts longer. Give it a clean occasionally with compressed air (or just blow on it).