Instruct: Classify the given Amazon review as either positive or negative.
Query: a glorified hand warmer

All I can say this "heater" is Nothing more than a glorified hand warmer! Using a thermometer in my garage, this thing did NOT raise it up one degree.I even left it on all night and sealed up my garage tight and after 12 hours no change in temp. at all! This thing would only keep you warm only if you sat on it!