I have a Vado 3.0 IGH with almost 1,000 miles on it now. I wouldn't call it a "CV" like I do for my car's "CV". The Vado is more "IGH" and does require that you "back off" a little when changing to a higher gear, I look forward to a future version where that isn't true. But the belt and lack of any external gears is wonderful, I haven't washed or cleaned the drivetrain since I bought the bike, and I commute on dirt roads twice a day.