Product review (2 stars): Had to Replace in a month
At first, these filters worked great.  There was not a difference in taste between these and the more expensive filter.  After one month, however, the taste of water went down hill drastically.  My water tasted more minerally and dirty than water straight from my tap.  I purchased a three pack of these filters, and they last a total of 3  months versus 6 full months from the expensive filter.