Product review (5 stars): So Necessary, So Unfortunate.
This filter proves to me that NYC water quality leaves a lot to be desired--and hopefully leaves it in the GSWF refrigerator water filter.  It must be working because it only takes about 2 months to notice a decrease in flow rate which I must assume is due to captured pollutants.  I feel it is best to avoid the generic substitute because the description indicated less thorough filtration.  It is scary to see the increasing cost of clean water.  How can our society be so reckless with such a precious commodity?  NO FRACKING!