Product review (5 stars): As good as the name brand at considerably less cost
Given some of the negative reviews, I was somewhat leery when I bought this, but then I figured there were very positive reviews, too, so it might be worth a chance.  I have had the filter in place for several weeks now and I cannot tell any difference in the quality of the water than when I was using the more expensive name brand.  They are identical in all respects that I can tell.  I have no explanation for others issues with them as mine are working as expected.  For reference: my refrigerator provides water through the door.  I have well water that comes out of the well the color of weak iced tea.  I have a whole house water filtration system that removes the iron and a lot of the other minerals that cause the water to taste and look funny.  However, the filtration system imparts a taste of it's own which I find less disagreeable than the unfiltered water from my well, but still funny tasting enough to make me not want to drink water out of the tap.  This filter provides a final step in the filtration system that actually removes the house filtration system taste.  It isn't quite as good as bottled water, but it is very tolerable to drink.