Product review (5 stars): Excellent replacement filter.  No issues installing it or running the ice maker or filtered water dispenser afterwards.
Perfect replacement for the original, as supplied water filter that came with our KitchenAid refrigerator.  I've read the negative reviews about this filter.  From the ease I had replacing my filter, and the problem free operation afterwards, I'd say these people either ordered the wrong filter (which is very possible) or didn't install it properly by turning it clockwise as far as it can go.  The drop filter is an exact O.E.M. replacement for the refrigerator.  So long as the correct number filter is ordered.