Product review (5 stars): Looks more intimidating to install than it actually is. Don't mind the grease.
I unboxed this unit and immediately wondered if I was in over my head -- a fear which was unfounded.  There were 2 replacement wiring harnesses included with the unit because it appears to be a redesigned "kit"to be used in a "Type A or Type B" type of icemaker. You'll find out what you have when you open up the instruction manual and remove the front cap of your icemaker. If my observation is correct though, the more complicated Type A has a power switch on the side of the unit to turn the ice maker on or off whereas the Type B doesn't. Thankfully, you can skip about 10 steps of the installation with a Type B.
Also, as a guy who isn't an appliance repairman by day, I thought the "clear grease" on the unit was an accident, and I spent a bunch of time trying to wipe it out only to realize when I pulled my non-functional (original) unit out of the freezer it was on there as well.  I later realized that the ice would never come into contact with the grease.  Oops!
I would definitely buy this part again if my unit fails.  It's about a 20-40 minute repair job for an average person.  Just take your time.