Product review (5 stars): Outstanding.
I absolutely love these filters; the specs are fantastic, and taste-wise, they are the best I've ever used.  They also seem to last a long time.  We use them in our fridge, and for a family of 3 who drinks a lot of water, even after 6 months they are still going strong and producing great-tasting water.  (I usually replace them after about 9 months.)  They are also incredibly easy to swap in & out.