Product review (4 stars): Perfectly Fine For an Inline Filter
We've been using this filter for years now for our refrig. ice and water dispenser.  No, it will not perform as a multi-stage water filtration system or the $70 one that goes in the bottom of your refer., but it is perfectly adequate for use with quality city water.  Ice tastes much better than before.  Water in the dispenser tends to last longer in the cooling loop inside the refer.  With straight city water, it will quickly foul if water is not used regularly.

Cartridge is a bit pricey, but again - it works fine.