Movie Recommendation: 'Cadillac Records'

Caught it last night: Based on the story of Chess Records in Chicago. Characters include Muddy Waters, Little Walter, Willy Dixon, Howlin' Wolf, Chuck Berry, Etta James. Len Chess and Alan Freed. Not entirely sure of the truth/BS ratio, but it is one of the better flicks I've seen in a while. Not overly romanticized, and doesn't conveniently answer all questions.