Instruct: Classify a given Amazon review as either positive or negative.
Query: Refrigerator Water Filter

I'm not so sure this is a good idea. I paid for my water to be analyzed and you cannot ask for better. What I've found is the refrigerator manufacturer put a time mechanism on my particular refrigerator that lights up at 6 month intervals, regularly and without fail. For the past 3 years I dated each cartridge I replaced and checked it against the "replacement light" that notifies you a change is needed. Living alone I do not use that much ice or filtered water from my refrigerator, therefore, the replacement light goes on EVERY SIX Months without fail and oddly enough I also get reminder emails from the company I purchased the filters from! Hum? What does this mean? Those cartridges are spendy.