I always have three thoughts that discourage me from buying items like this:
(1.) Where do you keep this thing when it's not in use, so that it isn't inadvertently discovered by kids or guests?
(2.) Can you ever get it clean enough after use?
(3.) What if I drop a bunch of money on it and it is worthless?
I'm with sweetpea and would certainly try it, but don't think I would ever buy it. I would need someone I trusted to say that they bought one and it was worth the money

before I sprung for one.