Product review (5 stars): Instructions were wrong, but it's easy to install
The instructions that came with this unit appear to be for a completely different unit with a different part number.  I googled around and didn't find anything that was much more helpful - but i found youtube videos for ice maker replacements on different models, and it didn't look hard, so i went for it.

If you're replacing an existing one, then you'll just remove the screws for the old one, pull it out, and replace with the new unit and you're done.

My fridge didn't come with an ice-maker originally, but was set up to receive one, so i was kinda starting from scratch.  The install of the unit itself was very simple: i just removed a cover in the back of the freezer (inside) that was covering the water inlet and a set of wires that plug right into the ice-making unit.  There were some caps covering holes where the ice-making unit is to be mounted.  I removed the caps and mounted the ice-maker with the included screws, and that was it for the ice-making unit inside the freezer.  Note: if continuing with the valve install, leave the lever in the up position, so it's not sending a signal to receive water.

This kit comes with a little electric valve that goes between your home's water supply and the ice maker.  When your ice-maker's lever is in the down position it sends a signal to this valve unit to send water up.  The kit comes with the tubing needed to connect the valve to the inlet for the ice-maker.  On the back of the fridge (outside) I removed the panel at the bottom and plugged the unit into the only plug that fit it.  I then ran the line that came with it up the back and into an inlet which feeds directly into the ice maker.

The trickiest part was getting a water supply to the electric valve.  This kit does not come with the tubing needed to bring water to that little electric valve - you can get a kit at the hardware store for about $12 for plastic tubing, and about $24 for copper.  I got copper because the instructions (altho for a different unit) said to use copper - I cannot comment as to whether the plastic kit will work with this unit - but my guess is that it would.  The kit i got came with the compression nut needed to connect this tubing to the electric valve.  Of course you then need to get the other end of that plastic or copper tubing to a water source; which can be one of many situations, and is outside the scope of this review.

The next day i had a full tray of ice cubes!  My wife is thrilled :  and me too)

Good luck!