i want one!
I wouldn’t get one. Though it does seem like a genuine product (look at the videos on the profile).
Adam from Mythbusters bought one of these recently. He posted some pictures (and maybe videos; can’t remember exactly) on Twitpic and tweeted about how excited he was to take delivery of it. Of course, he loves his Segway, too, so it sort of fits his interests.
I’d like to ride one sometime, but since it would take away the exercise aspect of unicycling–which is what I like best–I don’t think I’d be interested in owning one.