Product review (5 stars): 4 Pack is Fantastic
The filters were delivered on the day Amazon said it would.  The 4 pack of filters is a fantastic deal.  As far as the quality:  So far so good with the first of 4 filters.  We anticipate the remaining 3 filters will fit as perfectly as the first one.  What we are especially pleased with:  The ice is clear, and the water has no taste or smell.  Drinking a cold glass of water without concerns of drinking city chemicals to quench our thirst is a relief.