Okay after reading for about a week now about various hub motors I still do not have the following answers:

1) Which is better for effieciency (most miles per battery charge) front or rear hub motor?

2) What hub motors will do regenerative braking? Will they all do this with a well designed controller?

3) Is the Golden, or the Crystal, or other motor any different in the hands of an engineer who can inspect and reject it early, if any defects in the delivered product are noticed?