Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Be Warned!

I received the Magnum DVD set as a birthday gift, and thoroughly enjoyed watching a favourite childhood tv show. My problem was with the discs, there are four discs each with a side A and side B. Side B on two out of the four discs did not work! Please, if you have received this DVD set review and ensure that all the discs work!