I too have wanted to order one, but damn, that cost is CRAZY! I heard that when a lot of weight is put on (lot of the power bars) the motion gets very "Jerky" due to your muscles not having a completely fluid motion. I havent' heard any bad things, just it can by an annoyance.
Which one did you get? Let me know what you think, and if there are some qualities or options that you would like to get / not have gotten. I may still beable to talk the little lady into it.
Thanks,
Corey