Instruct: Classify the given review as either positive or negative.
Query: inefficient & noisy

I bought this portable AC last summer. At the beginning it worked "okay" - I mean, cooling down the room a bit (just a small room) with loud noise. The noise is so loud that I couldn't sleep. I later figured out that the noise came from the water tank vibration so I put on the tape to make it fixed. That somewhat reduced the noise but I hated that a customer has to try hard to fix the problem himself. This is not a good product should be like! Now this summer the AC is totally broken. It just brew out hot air. I paid more than $300 for less than 5 nights!!I bet there would be some people reply this post as: "You didn't do your homework!", "We are not even sure if he himself did anything wrong", blahblah... Listen, no one meant to break the product. A good product would leave no chance to the customer to do wrong unintentionally!