Oh -- forgot to say, this isn't a quantum leap in tech supposedly -- shaft drives were around 100 years ago and that's what Henry Ford based his autos on -- shaft drive bikes.

So if it was superior, the question is, why did chains take over? (That's what the naysayers say.) The proponents say we have improved the technology now, which is why they're great.

Again, I have no idea!

ETA: They have these in the LLBean catalog, too, with the LLBean label on them. I found them online thru Dynamic and got a little better deal, plus there was a special offer that included the fenders and bike rack, which made it an even better deal.