Product review (5 stars): Good quality filter & easy installation
So far so good (I just installed it a few days ago).

I have a refrigerator with ice and water dispensers. I got tired of paying increasingly high prices for the filter replacements, and wanted something that would last a bit longer. I went for the EZ-4 filter since my water company uses chloramine to treat the water, and the EZ-4 is the only filter in this series (and really the only reasonably priced under the sink solution I could find) that is NSF certified to filter chloramine.

Installation was simple. I didn't bother mounting it, I just placed it on upright under the sink (over a towel that I had already placed there in case of any potential leaks from the filter or elsewhere). The filtered water line then goes to the refrigerator, eliminating the need for a filter in the refrigerator. I immediately noticed a difference in the taste (or lack thereof) of the water.

I will check the filter regularly for any signs of leakage. No problems so far, but I will update this review it anything changes. So far, this is an effective and relatively inexpensive solution.