Sounds like those guys are just jealous that he beat them to the punch, taking that idea and making it into a superior, effective, high quality product. I've been beating the hell out of mine since April '99 and its still ticking.............works like the day I got it.
Just curious, but who really cares about New Again anyway? From what I've ever heard of it, its overpriced and nothing special. Never tried it, but never had to..........when it comes to deck strippers I use other sodium hydroxide based products for much less money. I've never cleaned a roof, so I'm not sure of its effectiveness there........but I know its argueable.
If you dont like a guy, and think his prices are a bit high, that's fine, but think twice before you step into a public forum and talk him down, please.