I own one... I have owned several since they came out until I found the right one for me. If you read my first post you will see that it's the only exercise machine that I am bringing down to TV.
I LOVE it!!! I use it most days. You only get on it for a few minutes a day.
It has a lot of benefits. Before I bought mine I googled it and found that the only people who said bad things about them had never used them or owned one. I own one and love it!
This is the last one I bought an I love it!
http://www.tfppolymers.com/VIBABODY_SLIMMER.html