Product review (5 stars): Lasted 2/3-8/7! Worth the $$!
*upate Aug 7, 2016 just now saying needs to be changed. Put in 2/4/16. Worth the buy!

* Update: installed 2/4 and its 4/28 and still going strong. And yes, we drink a lot of water.

 Installed it and at first the water is black. Don't be alarmed, run the water for about 2.5 gallons. By then the water will be nice and clear and taste just fine. Since we just got it (2/4/16) and I don't know how long it lasts, I gave it 4 stars. I will do an update when it has to be changed.