They are a nice idea, using a thermocouple to produce a few watts. Then using those watts to power a fan to produce a more efficient, hotter fire, and produce a few more surplus watts. The thermocouple technology has been around for a long while, but the idea to operate it in a small stove is a good one. I know some people that have one, but they will not part with it for a weekend for me to play with it.
At @$130. 00 plus the grill attachment, I don't think I would loan it out either. (I believe it will also charge your cell phone. or USB device)
They keep asking me what the output wattage is. How would I know if they don't loan it to me? I can only guess that it's 3-4 watts. That's the theoretical maximum derived by the engineers that own it, using the delta T characteristics of several different kinds of thermocouples and the heat output of the stove. I have no problem cutting apart an old USB cable so I can hook it up to the multimeter.
Or crazy cheap, build your own, wood-gas stove. I made on and it works great. The Emberlit works as well and folds down to nothing.
New guy here with my $0.02 worth... 'Wet Fire' reminds me of the older Gerber tinder cubes that were included with an overly large and bulky flint/magnesium rod (black or orange, IIRC). Anyway, I tried the cubes after 12-16 months of being packed away in a BOB (a cool dry closet). Sadly, they were useless! They fell apart and even the smaller pieces refused to take a flame (much less a spark). I think the thin foil-type wrapper may have been the cause but either way, I would never rely on such a item. As cheap as the company may be with many items, Coghlan's waxy tinder cubes are superior to anything I've ever used. Weather-resistant, small, and once "fluffed up" take a spark from even an empty Bic lighter!