if its the unit I think it is I was told it has the guts out of the Colman first gen HW system that played up a bit, apparently Colman fixed a few probs and palmed off all the old stock???? was told this by a rep when they replaced my Colman gen 1 with a gen 2.
$150 is 1/2 price of the Colman which I love prob worth a try but you get what you pay for
Colman were excellent with the probs I did have to start of with, now no more probs with the new unit