Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't Buy Simer - You're Warned.

I purchased this pump last year intending for emergency use, and did not use it until yesterday. You know what? It only hums but no water coming out! Called Simer and Amazon. None of them will provide any help. It turned out I just purchased a junk which is supposed to help in emergency situations. Don't buy any product from Simer, period!