Product review (1 stars): Absolutely Aweful
No comparison to the PUR filters that Whirlpool used to use.  I flushed it with 4 gallons, per the instructions, and the water tasted like plastic.  I flushed it with 2 more gallons, same taste.  I usually take internet reviews with a grain of salt, but the poor reviews for these filters are accurate.  Don't buy it, unless you don't mind horrible tasting water.