Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Was wonderful for the first few months...

It cooled my 15.4 laptop fairly well for the first few months and then out of nowhere starting making this grinding noise from the right fan. I don't understand what could be causing this because I don't ever move the cooler, it stays on my desk all the time. I would poke at it and sometimes it would quiet down but nowadays even the gentle poking isn't working. It's LOUD and GRINDING. But again, it's a good investment if you need something you'll only use for 5-6 months.