I can appreciate the technical hurdles and challenges that had to be overcome to make it go together, but I also feel that there can be too much of a good thing - and I think it might look a bit like this. So, all due credit for technical brilliance, but I'd expect the engine is much too powerful for the driveshaft/swingarm, and available traction from those tires&wheels, and the suspension and brakes aren't up to what the engine could propel the bike at. So, from an overall "is it a good motorcycle" question, I'd say "no", but it is a heck of an interesting novelty.