Product review (5 stars): Whirlpool Icemaker
For those of you wondering, this is a real Whirlpool factory certified part.  It arrived in a Whirlpool box, and taking the gear cover off reveals the FSP (Factory Specification Part) molded into the plastic.  It isn't a Chinese knockoff, which I was worried about, since I also ordered the ice level fill circuit board at the same time and it WASN'T Whirlpool or FSP.  Check my other review for that fiasco.  In doing more research on these parts, the original Whirlpool or factory replacement icemaker will have a dark gray or greenish ice mold (where the water fills and ice forms).  This does have that.  The knockoffs will have a white mold instead.

At any rate, I haven't installed this yet, I want to wait to also install the correct ice level circuit board at the same time.  Will update my review upon install and confirming this works.  But for now, just being a real Whirlpool part earns it five stars.

Update 4/22/13: Installed this today, and within a minute it cycled correctly, making ice cubes later.  I now have the "Acceler-ice" function activated to make a full bin of ice as quickly as possible.