Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Won't work well with oily beans

After two or three years ownership, this product is a $200 disappointment. Two stars only because of the oily bean problem. Come on, now, for $200 you should get a near-perfect machine. I should have bought an $80 Capresso grinder.Pros:Looks nice; makes an even grind; low static cling; heavy duty motor; replacement parts available from Baratza; polite and responsive service department.Cons:Frequently has trouble with oily beans, the grinder spins but won't grab the beans. You have to shake the grinder to get it to continue grinding. This is after making the factory recommended adjustment to the slowest gear speed.Knob falls off. Baratza sent me a new one, but the new one is still not quite tight enough.The hard plastic ring inside somehow went bad. A $12 replacement part from Baratza.