Yeah, I was looking at that a year or so ago. Seems there are 2 camps on it for sure. Pretty divided opinions on it. When I first went to their website, I really wanted one on this bike. I even went so far as to see about getting it custom installed on a Spot bike. That was when I thought a couple grand for a really nice bike would be good -- Don't feel that way so much anymore. I really don't think a Nuvience would be any better (or worse most likely) then an internal gear hub, which I already have, so unless I want to stay away from running the power through any hub, I think what I have, I'd use.