Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Power Bars Arrive Past "Best By" Date

Be careful--my order of 12 Power Bars arrived today, March 15,2012, with a "Best By 10 Mar 12" on the box.Update: By just advising Amazon, they did an immediate correction offering to refund my purchase. Great customer service by Amazon for another Seller's issue.