Product review (4 stars): Works great, just make sure its going to be 100% compatible with your current fridge and harness.
Physically fit perfectly into my Kenmore fridge model 253.78822013 to replace my AD-18 ice maker unit (which died after one year) that came with it.  However my original AD-18 ice maker unit didn't have a plug on the end of the harness that goes into this unit so I had to open it up and cut the wiring until I had the 4 wires exposed.  I had to do some studying and looking at screenshots of the wire layout where I eventually soldered the wiring to the pins that the harness would normally make the wire connections to... added a little shrink tube around the connections and plugged it into the fridge.  And a couple of hours later there was ice!  So depending upon how brave you are you could do what I did but you might find it easier to remove your current ice maker (don't worry about shutting off the water or anything like that as the ice maker is the thing that calls for water from the fridge so you can just unplug and pull it out in less than 5 mins) first to determine if you have the necessary harness plug that would plug into the new one and if you don't, you might be better off looking for a different unit because if I knew my current maker didn't have the necessary harness plug I would have looked for a different one.  But I didn't want to hassle with returns costing me more money and delaying my install of a new unit... plus I knew I could get it working if I could figure out the wiring.  So just be aware that you really should have a harness plug that can be unplugged from your current unit that will be able to plug into this new one... if I had that my install would have taken 5 mins or less instead of a couple of hours and a soldering iron.