Instruct: Classify Amazon reviews into positive or negative sentiment
Query: GE water filter

After installing the GE MWF water filter in my refrigerator , I ran water through it on several occasions and tested the water with the water tester that came with my previously purchased ZERO water pitcher. The water that was supposedly now purified with the GE filter did not test well, and, in fact, tested the same as the "unfiltered" tap water straight from my faucet. I believe that purchasing and using the GE filter is an unneeded expense and a waste of money