Instruct: Classify an Amazon review into positive or negative sentiment.
Query: The best music documentary PERIOD

If you like thrash, you must get this. A complete history of thrash through the eyes of those who were, and in most cases still are there. From the dark days of the small clubs to the large scale stadium tours its all covered through interviews with so many bands its imposable to list them all. A must have for old an new fans of the greatest kind of music the world has ever heard.