This is second hand from a dude I used to work with so take it for what it is worth!
He sold his at a garage sale cheap, b/c he had tons of problems with his Zodi in the blowing wind and high altitudes. Guess it would go out constantly and also freeze up and stop!
Though, I have heard great things about them for general use and during long camping trips it sure would be nice to take a hot shower once you start smelling yourself!!