Instruct: Classify a given review into positive or negative sentiment.
Query: Poor Gear Material Design

The gear that links the powerful motor to its shredding teeth is made out of poor material... yup, you guessed it, PLASTIC! WHAT KIND OF DESIGN ENGINEERS DO THESE COMPANY HAVE? And just as expected, in just a few months of service, the gears have worn out and this heavy duty machine has turned into a very expensive TRASH CAN with wheels.