Product review (5 stars): Cheap and easy.  Works for me.
This was an easy and cheap replacement for the old, stripped-out coupler.  Unlike the original part, this has got a metal insert to reinforce the area that got stripped out on the original.  This does make it slight tricky to push onto the drive shaft but I used a deep socket as a drift and tapped it into place with a hammer.  Not sure if I'd look forward to trying to pull it back off if it ever wears out, but I suspect that this replacement part should outlive the rest of the washer.  Simple replacement job; search youtube for the procedure.