Product review (5 stars): Perfect replacement
Followed instructions on You Tube and got the coupler installed.  One You Tube video suggested that first time installers remove the entire drive mechanism from the chassis, but  even with modest mechanical skills I found the access from to bottom just adequate enough to leave the agitator mechanism it in place, which saved time.  I leaned the washer against the wall and propped a jack stand under it to keep it from falling.

The previous coupling was a little hard to remove, but I hit it from behind with a hammer and screw driver.  The new one was just as difficult to slide into place, so I used a hammer and large socket to drive it on.