Instruct: Classify a given Amazon review as either positive or negative.
Query: 4 year service plan

I never did receive the certificate that was supposed to be shipped to me in 7-10 days. Insurance is one of those things you buy and hope you'll never use. I guess if I need it I have copies of the recipt showing I paid for the 4-year service plan, but there is no excuse for not shipping the promised certificate.