Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Filter took 6+ hours to fill dispenser

This dispenser/filter seemed to be great at first, but within a couple of weeks, the filter slowed down to a crawl. Eventually, it took more than SIX HOURS to filter a full container of water! We found ourselves drinking our horrible-tasting tap water as a result. :-( We tried to put in new filters three times, but eventually each filter slowed down to an unacceptable speed, too. We ended up buying the Brita dispenser instead and threw this one out.