Product review (4 stars): Tight fit but works fine
Some people seem to prefer the old all-plastic design, but this has worked fine for me. I do load my washer down pretty heavily and I have not had any issues with this part. My only gripe is that the coupler has an overly snug fit to the motor shaft. I had to whack it pretty hard with a hammer to get it onto the motor shaft, and I would really prefer not to be hitting the motor with a hammer especially since there isn't really any reason that it needs to fit that tightly. If you find yourself in the same situation, I would recommend setting the motor on a hard surface with the opposite side of the shaft (the side that drives the pump) against the ground while you put the coupler on. This way the force of your hammer blows gets transferred  through the shaft and to the ground rather than the bearings or electrical parts inside the motor.