Product review (1 stars): Does not work.
For $50 I can't figure out what this filters - it certainly doesn't filter out minerals, nor do water and ice cubes taste any better than water from the tap.  If I leave a  few drops of water from the water dispenser to evaporate or an ice chip to melt - it leaves a heavy white calcium build up.  I have to clean the refrigerator water/ice dispenser frequently because there is so much residue buildup.
I've used several of these filters now, carefully reading the installation directions, went to the local appliance dealers and verified I was installing it correctly - they just DON'T WORK.
To clarify, I have city water.