Product review (5 stars): Quick, easy and relatively painless.  Just make sure you match up the part numbers and you're on your way!
Can't say enough good about this product.  I was a little hesitant to buy this considering I didn't have a Whirlpool/Maytag tech on the phone holding my hand through the process.  Let me say that it didn't matter a bit in my case.  I rolled out the refrigerator, unplugged, unscrewed the back panel and it only took me a little fumbling around with a flashlight to figure out where this went.  I barely needed the provided instructions (which were excellent, by the way) and I was back in business.  Honestly, the toughest part of this repair was defrosting the frozen drain in the freezer itself, definitely not replacing this part.  Even that wasn't that difficult, just time consuming.  I've had this in place for about three months now and I haven't had problem one with it since.  Thanks, guys!