Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not working as advertised

no way do you get up to 4 months usage as advertised on TV. customer support says up to 100 gallons of water - I doubt that from my experience. averaged 2 weeks per costly filter. the LED (green, yellow, red) really serves no meaning function as it does not seem to actually give the you the status of the filter's condition.would not purchase one again. look elsewhere for a different product and consider an under the counter system.