I didn't read the reviews that GKL posted, but did notice in the ad that there was no option for purchasing a fuel cell by itself. This would be my greatest concern. Two years down the road, when the supplied cells are now "dead", where do I get another, and how much will it cost?
While it's nice that folks are keeping new, (and even old) technology alive, it's kind of useless if one can't get replacements at later date.
I think, like the Faraday flashlight, it's a neat gadget, but it won't "take".
Roger