I'm also in the camp that doesn't quite "get" 650B, but I also haven't really tried it. I'm content with riding skinnier tires, and it's not terribly difficult to find a frame (new or old) that can fit at least a moderate width 700C.

On the original topic, the VO kit seems like a good deal for what it is - especially if used as a city bike. As a tourer, though, I would think that the less conventional tire size could pose problems. Good luck if you need a replacement tire while on the road.