Product review (5 stars): PURE FLOW Filter
We bought a new home in AZ, and they had a Maytag refrigerator with no filter in it.  The water tasted awful.  The filter was easy to use and install.  You have to run a gallon of water through it, which seems like a lot, especially in AZ.  We watered the plants with it.  Irregardless, the water tastes wonderful, no after taste.