I forked over more than 4x the price of my old Rockfit Trainer for the new Firmwave, & I cannot recommend it. As you recall, I purchased the Rockfit many years ago in a closeout sale somewhere. It is a great, cheap sagittal/frontal plane close chain UE/LE exercise device. It even came with this really high quality exercise band that could be attached to incorporate integrated work. I used it so much that I wore out the anti-slip pad on the bottom, which the manufacturer replaced for free.
The firmwave is too small for most athletes, you get the sensation you could fall off the thing. It comes with this crappy workout DVD which went right into the garbage. Don't waste your money.