I would be skeptical, but since it's how can you go wrong? What does it cost?
I assume you won't use Slime because of the terrible mess and general hatred from the tire shop? The kids bike tires always end up with Slime in them sooner or later. I have it in some mower tires, too, but never something for the street.
Yeah I'm not saying its a miracle product, I know about as much as you now, just from watching videos and reading the website. But, I feel its a step up above slime. Quickly looking up cost- expensive. But all 'newer' things are. Slime is pretty cheap these days, even dyna beads are costly, considering what they are and how much you use. And who knows, has slime changed their product over the years? Hell my wife's new Elantra didn't even come with a spare, it came with slime! No kidding. I hate it.
Just a keep in the back of your mind product. Thought about putting some in my truck cause I don't care about that thing, to test for my bike. But after seeing the cost.... maybe not. $29 to do the bike. $130'ish for the truck.

Of course, found this on one of my motorcycle forums. I think for the average person it has more of a place there, you definitely don't want a puncture and a low-to-flat tire on two wheels. $30 is certainly worth preventing an accident. If its as good as the videos show.
For the average person, $130 of this stuff for a DD... that's a lot of plugs and patches, and depending, a new tire for that cost. But I guess if you for instance, don't ever have to plug a tire for 50-60k miles (or balance, weights falling off, etc), and replace them cause its worn... well.... maybe?