Product review (4 stars): A big improvement in my water
The city water where I live is terrible, so thank goodness my refrigerator has a water filter.  To overcome part of the water issues, I do find that I need to replace these cartridges more often than stated or I get breakthrough taste and smell.  But they do supply much better water than comes from the tap.  Ijust wish these would break some of the hardness of this water, too.