Product review (5 stars): These things have better flow than the one that came with my refrigerator.
So my fridge has a  way to tell it exactly how much water you want to come out. With the filter that came with my brand new refrigerator the amount I told it to do would never be right. Also drastically less. With this filter if I tell it 2 cups, I get damn close to two cups.

So it's cheaper than the official and works better.