Product review (5 stars): Good price, real deal
It's the same thing that came with our refrigerator.  I've gone through two 3-packs now, and have seen no variation to quality of the water I can notice.  In general, I'd say the water seems better than the PUR filter we keep on our sink, but it could be that the cold makes it taste better, I haven't run any tests on the water.  I do put a dish towel below them when I change the filter, since it sometimes shoots out some water.  I also don't do by the filter light on the door, which seems to just be timer driver.  I use the date stickers that come with these pack, and that has worked out great.