Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Terrible water filter. Ridiculously slow. Horrible customer service.

We bought this filter [...] about 2 months ago. It worked just fine for about the first week. Then, it started to slow down, and get slower and slower, and slower. It basically drips now. We have to put a pot underneath it to catch the drips for hours so that we can collect enough just for drinking. Ridiculous.[...].