I have the same Panasonic drive on my Giant.
I run it through a NuVinci. I think it is fantastic.
I also have a Heinzmann hub motor on a Biria. The Panasonic drive is 350 watts. The Heinzmann is 400. Being able to take advantage of the NuVinci's gearing the amount of torque I can get from the less powerful Panasonic motor is vastly more than what I can get from the direct drive Heinzmann hub.
The Panasonic setup acclerates faster, can move more weight, and climbs better than the Heinzmann.
Last edited by Allen; 12-13-10 at 04:49 PM.