Just so you don't think the previous 3 posters are over reacting:
The reason they give for no photos due to "patents" is pure and utter bull $#|+e. You can build any patented device for your own use.
Any time you or your goods are in public view, anyone can take all the pictures of you and your stuff they want. By being in public you give away the right to privacy while in public view.
The reason is because nobody has ever built one that works as advertised because it violates so many accepted physical laws it is just about as close to unworkable as possible.
You would be buying a large load of bull$hit at an exorbitant price. I can find you pretty much all of that you want, free for the hauling. It tends to build up around this area in winter with cattle confined in smaller areas for winter. I know for a fact that a great big pile of manure can generate heat. Just look at Washington,DC.
Run, fast, do not look back.
For your own good.
Cheers.
TomW
P.S. We really need a "products" section for reviews so these type scams can be archived so this doesn't continually resurface giving the sites link references that drive online search engines. Tricky stuff.
Out.