Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointed

After I read all positive and negative reviews, I decided to buy this product because as noted in many 5 star reviews, it could provide enough heat for a room. Well, the unit is functioning but its heating capacity is very poor. As long as you are within 1 meter diameter from the unit, you can feel the heat. Otherwise, it is a waste. I don't understand how people say it can provide enough heat for a 12X12 bedroom even with a vaulted ceiling! Are you kidding me?