Product review (3 stars): some of the filters in a 3 pack work great
I got 3 pack twice. i change filer ~4 months and so far used 5 of these filters. 3/5 have been outstanding. Great water flow from beginning to end. 1/5 started out great but water flow came down to a trickle after 1 month. 1/5 totally sucked from the time i installed to 3 weeks, when i decided to toss the filter out and replace it. Generally consumers see either binary vision of quality. great or sucks :). I continue to buy these because for the price  is about 1/2 and about 60%+ of the time they work great. I would love it if at least all 3 filters in the pack behaved the same way. In both cases, the 1st filter worked great. I am just too lazy to ask for warranty return/claim looking for an order that was 5 months old.