Instruct: Classify a review into positive or negative sentiment.
Query: Part Fail

This is an overall nice blender, but the rotor is made of a low grade rubber and slowly disentgrates with each use until there are no teeth left to spin the blades. I called Kitchenaid about it and was given some nonesense about 'planned wearing' to protect other components. In other words the failing rotor is a intended design aspect. I've had it just over 2 years, and now to replace the rotor is a 25 dollar service charge.