Product review (4 stars): Works well. Very well.
Sonya's husband here. It wasn't terribly difficult to install, but the screws holding the mounts are hidden behind the icemaker, so I had to feel around for them and take them out blindly, but once that was done the install was quick. As others have mentioned, the cut-out for the water channel does not simply pop out, so I used a box cutter on that.

Now that it's in, the ice is flowing. Very well. There is no attachment for the arm that tells the machine when the icemaker is full, so I attached the plastic piece from the old one. It doesn't seem to help much in terms of stopping the flow of ice, as you can see in the picture, as it fills up very well. If that's the worst thing I can say about it, then I can hardly complain.