Product review (5 stars): Crystal clear, great tasting water.
I bought these in spite of the current reviews.  After installing them, I filled a container full of water.  It came out crystal clear.  I filled a glass with water and drank it.  It tasted like perfectly clean water.  My kids and the rest of my family get their water using these filters and no complaints.  Just clear great tasting water.

I'm not sure why all of the bad reviews; if there was a problem with manufacturing at some point; but these worked great for me and I will purchase them again.