This was a cool machine, but it was beastly. It boasts of a "biomechanically correct stride pattern to minimize joint and muscle strain." The two ramps you see above both have "skates," so as you move your legs, you simulate running, but without the impact.
I thought this would be fun but it wasn't at all. It hurt. I last all of 1:xx my first attempt and I wanted to call a fireman to put out the flames in my quads. I eventually conquered a full 5 minutes on this thing, and while I was extremely wobbly afterwards, I lived to tell about it. Now I want one! I know I said I hated it but really, what better way to stay or get in shape than to do something that hands your ass to you? :)
Happy Running, guys and gals!