Yes, there have been some posts about this product in the past in our forums, although I haven't heard of anyone actually using the product and what their experience was. It does look like an interesting concept, but the other reality is that most folks in the wintertime are either on metered sites or already paying the higher site rate that includes electric. As I recall, there were a good many unanswered questions raised on the clearance issues as pointed out on the website, and a lack of information on the electrical requirements and BTU's produced. Other than the "set it and forget it" convenience, there is probably no cost difference than using a couple electric heaters.
I hope someone has one installed and will chime in.