Instruct: Classify Amazon reviews into positive or negative sentiment
Query: broke down the first week

When it first arrived, I was disapointed by how small it was and how little heat it produced. The price was high that I paid for it, but I suppose it was because of the nice looks and the small amount of space it takes up. A week later, the heater quite producing heat besides a small wave on and off. It may have been caused by the non-stop use that it went through cause I probably only turned it off twice, but you'd think that (...) heater could heat a simple dorm room with ease, but this heater didn't put out enough heat. The guys in the dorm next to mine bought a heater (...) and it does twice the job this one did. (...)