Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Defective Product

A comment from one of the readers indicated that there is "bad burning smell almost like plastic".I purchased from Staples and have the same problem and plan to return it. Suspected reason: The roller at the top does not stop rotating when the printer goes into SLEEP mode. The top area appears to be very hot as well. I am sure it is going to catch fire on a warm sunny day.--Follow up Comment- Samsung promptly replaced the defect roller -- and it is working very well for me. I can give it a 4 star now.