Product review (5 stars): No More Leak
Fit perfect and no more leak.  The instructions say you can install this without removing the front of the washer but I'm going to say it is not possible without super human strength and flexibility and an extra pair of arms.  It is really easy to remove the front of the washer anyway.
The hardest part of the job is getting the rubber lip seated perfectly and stretching the evil spring around the lip.  Sounds easy enough, stretch a big round spring around the lip of the washer, well its not.  I recommend having a helper to help hold the guide things they give you in place while you pull with all your might to get the spring all the way around the lip.  Try and stretch the spring as much as possible as you start wrapping it around because at the end you will need every last millimeter of springyness you can get.