Its a great looking bike and appears well built. It would certainly be much faster than a bicycle with a common motor kit like the 2T Happy Time motor or 4T Huasheng . Since the power rating and multi-gear transmission require a motorcycle license in most states, I think they would sell more units by upping the displacement to 125cc or so.
I didn't see a price on the site. It would be nice if the price was competitive with 50cc scoots.