Nick, you know about the Floater?
It's a trusted way to get a good amount of honest feedback from a group of real cleaners.
Bet if 5 guys each had a couple of weeks with it, at no obligation to them, we'd have all the input we'd need to sell it to lots of cleaners; at least I'd use it to try & sell it to every customer I have. I'll put up the money for the unit and want to sell them later on after the results are in.
Another option would be to sell to the Floater guys at discount if they provide you good, useable videos you can use to sell with. Already, they're linking to WhiteGlove's videos at places like FB, even MB. Pretty much shut up the naysayers too didn't it?