The first prototypes of this motor was indeed very jerky. Bafang has improved that quite a bit in the production bikes. On top of that, we have our own programming to make it much smoother - just like the programming on most of our other Bafang powered bikes.
Right on!! I'll have to drop by and give it a ride... the original MX with the lower power and torque sensing is a great bike and no doubt this is a huge upgrade.