I had asked a favorite LFS about it and he had one on hand to show me how it worked. He compared it to the surge created by the tunze wavebox and it was no comparison. There were several things I didn't like about it.
a. You can't use only one for a larger system (100-200 gallons). You need 2-3 total to get the correct motion. I believe only one Tunze wavebox can be used for sytems that size.
b. The motor heats up like an oven. I couldn't touch it, it was so hot. I've read on other forums that he motor gets so hot that it overheats and faults.
c. It is actually less energy efficient than the Tunze wavebox. I believe it is 3 or 4x the energy consumption.
I understand the Tunze is twice the cost, but in the long run it is less expensive than the Wavebox when you consider motors overheating and needing replacement, external belts snapping off and needing replacement, and long term energy consumption