The air time suggests that it's running lipos in the video (light).  I don't like the bouncing but I have to say it seems to be balanced properly.  It keeps a good attitude in the air and lands properly without getting upset.  That's impressve.  But the bottom line is when your prop is not in the water, you are slowing down.  It looks kinda fun but I'd guess that stability would ultamately be like the SV or worse.  Probably even wilder with some mild speed increases.  The big question is what market are they going after?  It's too similar to the FFT.