Product review (5 stars): It fit my fridge fine, and the water looked clear almost immediately
It fit my fridge fine, and the water looked clear almost immediately.  I followed the instructions it came with, adapting slightly as common sense dictated regarding my specific installation.  I ran the water until all the air was out of the line and continued running it for the gallon and a half recommended, though the water looked perfectly clear practically from the start--but I ran it in case there was a funny taste in that first part or something (I wasn't going to try it to find out!).  It's been fine as far as I can tell ever since.