Instruct: Classify the given review into positive or negative sentiment.
Query: stops working after 6 months

Well, I haven't experienced the water smells like other people have talked about, but i've been thru 2 of these and they only last 6 months max. I bought them locally at store at $70 each, and I'm convinced it's bad investment. If I knew they would go for a couple of yrs, I'd get another since it's been great otherwise.