I bought this almost 2 years ago  and so glad we did, there is a huge difference in the taste of our water . I thought our well water was crystal clear, well after using the zero water filter, was I wrong.! Its unbelievable the tiny particles , different colored particles that I could not see that are left behind that are not going through the filter  but sitting on top , its really gross that we were actually drinking it all these years. I had a competitor filter before and it did not do this well..I'll never stop using a Zero filter !! I think it deserves a 10 star. My opinion .