Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Faulty Rheostat Design

I have had this smoker for 8 years. The tank and operation is convenient and does a good job smoking food. The electric element however, i.e., the rheostat that plugs into the heating coil, burns out every two years and it costs me $50 to replace it. I have gone through four of them. You would think they could design one that holds up. Anyway, that's enough for me. I'm going to another brand.