I guess by answering I have to admit I've sat through the infomercial *a coupla'* times
It sure seems like a lot to spend on a machine that only does one thing ($200+?). And the thing is huuuge.
Reminds me of my brother's home pec dec machine.
Beyond that, can't say that I'm all that impressed with the actual movement just from seeing it on TV (haven't tried it myself, though). I think one would be better served doing the basics like bridges/planks and swiss ball stuff.
I sure wish core work were as easy as 'hopping on and going for a ride', as Jake likes to say (OK I've seen the infomercial more than a few times).
On a related note, I tried the Ab Lounge for shits and giggles the last time we were at a sporting goods store (I like to try the Bowflex there, too). It's basically like a broken ole' chaise lounge that you lie down in. Man does that ever NOT work (could be I was doing it wrong) - and I felt absolutely ridiculous, even more than when I tried Tony Little's Gazelle