I haven't seen anything about this here. What are WW's thoughts? Seems like a decent idea. I could see them at cable parks as something to "learn the motions" before taking a trick to the water. Don't see individuals getting them like they would say a balance board though.
My friends and I use homemade indoboards and vew doo boards to train ourselves to press well. It's actually helped me to learn how to manual and nose manual on skateboards/longboards. That machine looks super fun though.