Product review (5 stars): Ummm...how does one rate a water filter?
It installed easily and was a perfect fit.  My water tastes the same as the last filter.  Honestly, what else can I say?  I'm not a water quality engineer and I did not perform any tests.  I'll take their word that it is doing what it is supposed to do.  The thing fits and was the lowest priced option I saw when I purchased.  I recommend it for those reasons.