Product review (4 stars): the price for the 3 filters is a great value.
I had and issue with one of the filters a week after I installed it..grayish  threads started appearing in my water glass! It had not set dormant not is their a problem with our water supply...I ran about 2 gallons of water through it (same as when I installed it)then it cleared...I reported it by e-mailover a week ago and have yet to hear back from them! the price for the 3 filters is a great value...IF this problem does not re-occur