Product review (5 stars): Actually tastes better than the manufacturer filter. SERIOUSLY.
Where I live we have extremely hard and flat, salty tasting water.  Most people around here get their water delivered or buy 5 gallon dispensers.  I usually stayed away from using the water from the fridge because the filter still didn't do enough to change the taste to something drinkable.  The new filter went on exactly as it should.  The water is the best I've tasted out of anyone's fridge here in town.  I don't know how they did it, but they nailed it!  Much cheaper as well.  (and for me that is a big selling point)