Product review (4 stars): It Works
There's not much I can say about the pump itself, other than it is identical to the one it replaced.  The seller did include a screw band hose clamp which was much easier to use in this tight compartment than the original spring clamp.

Installation is fairly easy, though it is necessary to raise the front of the washer several inches in order to get to the screws that hold the pump in place.

I do want to take this opportunity to gripe a little to the good people at Whirlpool about a couple of issues I have with this pump.  First, why would you place a pump, which is supposed to be cleaned out often as part of the regular maintenance of the washer, behind a panel that is attached with screws which are difficult to access?  A swing away panel held in place by clips,or a small access door in the panel in front of the pump would have added little to the cost of the machine and would have made clearing the pump of debris a very simple matter.  Really, sometimes the thinking processes of engineers can be mind boggling.  It makes you wonder how they are able to find their way out of the house in the morning.  Secondly, if you are going to design a pump with a cheap plastic impeller which is almost certain to fail due to trash in the difficult-to-access pump, then please offer a replacement impeller instead of forcing us to replace the entire pump.  Paying a few dollars for a new impeller instead of $80 for a new pump would make me be far more likely to consider purchasing another Whirlpool when it comes time to replace the washing machine.