I've had my Treadclimber since November and I LOVE IT!!! I get a killer workout FAST, just like the ad claims. It has helped me tone and shape my thighs, hips, and fanny.
I picked mine up used for a fraction of the cost of new.
It is TOTALLY different than an elliptical. An elliptical does a smooth, oval motion. This is like walking up-hill.
I haven't seen any Treadclimbers in gyms near me . . . probably because I only walk by them and never actually go inside.
They are definitely a gym quality piece of equipment though.