Instruct: Classify an Amazon review as either positive or negative.
Query: Buyer Beware

I purchased this heater expecting great things, but it does not heat my 20x10 room at all. I left it on high heat (not auto) for a whole night. I woke up to a still freezing cold room. I had a dish heater for $50 that was quiet and made my room quite toasty. I regret buying this 100%.