Product review (5 stars): Great alternative to Sears
Installation was straight forward.  As others have noted there are no instructions but there are plenty of youtube videos to walk you through the installation.  Mine was for a replacement in a Kenmore Elite.  The part from Sears was $240 vs the $84 for this part.  The only challenge is that the reservoir where the water runs into the ice maker is taller than the original Kenmore part.  Just had to bend back the rubber inflow pipe when installing the ice maker.  Was back to making ice in about 3-4 hours.