Instruct: Classify Amazon reviews into positive or negative sentiment
Query: $40 exercise in futility

No mention is made of the VERY LOUD fan noise this unit makes. I paid nearly $20 in shipping when I ordered the unit, and then was tagged for a 15% re-stock fee (another $20) when I returned it to this vendor.Very bad choice on my part.I remain very positive and supportive of induction cooking in general. Since this futile purchase, I have had a Sears induction cooktop installed in my kitchen. It is FANTASTIC!This unit is not representative of a good induction cooking experience.