Judging by how stiff the guy is when riding it, this thing doesn't appear to be entirely self-balancing. He also seems to be leaning on the control rod on more than one occassion, so it's not just a joystick assembly, but a mechanical driving help too.
I however fear the bearrings wont last long with any dirt or moisture on the road and it's loud and slow. I also haven't seen it handle any small obstacle in the video.
A good choice by the designers to use standard Li-Po battery packs, but the cost of the unit without batteries is ridiculously expensive. Okay, good quality materials and manufacturing, but still... And at 33kg not including the ball (another 5kg) or batteries (who knows), that thing is frikkin' heavy!
Not saying it isn't a good idea, but I don't particularly like the execution. I'll stick with my electric skateboard.
