That's interesting... The reports that I was reading on endless sphere seamed contrary to that. Also, because it sits further up on the frame (rather than off the bottom) it's good for a Tern Link/Dahon conversion as it doesn't get in the way of the seat post being pushed in.
The cadence issue is because it's a combo of cadence and torque... And some are configured to be 60% cadence... I thought Lingbei offered different profiles nowadays?