Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Pure Water

These are nice filters and easy to install. I have been seeing that the filters are needing frequent replacements. I have not been able to measure how many gallons of water I get from each filter but atleast the quality of water is good.The side piece covering where the filter gets attached to the tap came out however it doesn't affect the filter functioning so I did not bother about it.