Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lots of fun at first...but falling apart after 18 months

I use the smoker an average of once a month, and for $399 I expected better quality. Within a few months the small plastic knob fell off from the slide control. Not a big problem. Then the puck feeder began to frequently get stuck. Recently the plastic frame of the door broke near the hinge, which I repaired but now i do not get a good seal. Finally, the heating element is putting out less heat each time I use it. The highest it will go is 150 degrees.Disappointing to say the least.