Product review (4 stars): It Works
I ordered this model because it was the one listed in the Owner's Manual.  lt turns out you can use the newer model (IM6, I believe) but it may or may not have some design/manufacturing flaws depending on what you read.  Either way the unit works great and was easy to install.  All of the parts I needed were included (even a few that I didn't need because they came with our refrigerator).
The only complaint I have is probably more a design flaw: the ice  tends to overfill the bucket until it overflows.  It could be an install error on my part I suppose but there isn't too much room for error.