I have owned it for over a year and honestly I just started using it about a month ago. I like using it to change things up, but honestly I liked the "fanny lifter" much better. I have to really watch my step on some of the faster moves with the wave because I don't always tend to strike right in the middle....but I tend to be more on the clumsy side too!
I do really like the ab workout with it.......I tend to feel soreness in my ab muscles I didn't even know existed.