I have had the 10-cup pitcher for over 3 years now. I purchased it since it is the only water pitcher in the market that filters out Hexavalent Chromium, which causes cancer. Since I live in Chicago, I know there are other contaminants in our water as well as the Chromium. Since our water often has a Chlorine taste, this pitcher results in water that is not only tasteless but is clear as well. I change filters about once every 2 to 3 weeks. I use for drinking water as well as for coffee and for my dog's water. Since Chromium was found in the majority of drinking water in the US, I think every person should invest in a ZeroWater product! I highly recommend this product and have no reservations at all!