Instruct: Classify Amazon reviews into positive or negative sentiment
Query: BEWARE

I had been purchasing Clif bars for awhile thru Amazon with no problem. I ended up throwing away my last order...I had ordered in August 2009, but didn't need to open box until end of Sept (past the return date). All 3 boxes in the order EXPIRED in 2008 ! I opened a few individual bars - they were dried up and made a mess! My error in not checking order immediately.