Instruct: Classify Amazon reviews into positive or negative sentiment
Query: What a b*st*rd! What a genius!

Taylor Hackford's documentary about rock 'n' roll inventor Chuck Berry has finally arrived on DVD, but it's the bonus DVD that is the true treasure. It's there that the director details the trials and tribulations of getting a movie featuring Chuck Berry in the can. To put it mildly, Mr. Berry is a notorious pain-in-the-*ss, demanding (and getting) bags of money upfront in order to complete a day's shooting. You think I'm exaggerating? I ain't. Check out DVD 2 for Hackford's hysterically harrowing tale. Chuck was such a bad boy that even music director Keith Richards had to behave himself in order to get things done.Chuck Berry is such a ... unique individual!