Product review (5 stars): Improves taste and removes chemical contaminants
This is (unfortunately), the only reasonably priced filter that meets BOTH ANSI 42 and 53 standards which cover taste, smell and several chemical contaminants.  All the others I found only meet ANSI 42 which does not include chemical contaminants.  No need to turn off the water supply when installing the filter.  It snapped right into place of the old one and not a drop of water spilled and works fine.