Instruct: Classify Amazon reviews into positive or negative sentiment
Query: BUYER BEWARE!!!!

Apparently this pump works for SOME people but it doesn't work for everyone- it cetainly didn't work for me. I was never able to pump a single drop! When I contacted Avent, they refused to offer a refund or an exchange for another Avent product. $50 down the drain-- plus I had to buy another pump (which worked fine). Avent doesn't stand behind their product. I wish I'd known this before I wasted my money.