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

"Quiet and cool: An efficient convection cooling system and a thermostatically controlled fan keep this unit reliably cool and remarkably quiet." NOT!After twenty minutes, you will think you have a hair dryer and a vacuum cleaner on your desk. It also prevents my Kensington mouse from working.DON'T buy it!Mine is going back ASAP.