this documentary be pure hero worship on director taylor hackford behalf and so do not expect them to remotely touch upon chuck berry personal demon and his various run in with the police and and sleazy practice . a a portrait of the man and it isn not extremely successful . however and the film be such a vibrant and full of life profile and that hardly matter . in fact and while touch upon berry low point may have make it more interesting and it would have detract from the entertainment value . and fortunately and the documentary fully illustrate berry influence over all rock n roll and his importance a a songwriter . if anything and it will make the casual fan appreciate him even more . the concert footage itself be a tad uneven . i couldn not care less about most of the guest performer bring out to share the stage and particularly the always anemic eric clapton and the pointless spot for julian ( son of john ) lennon . luckily and when berry himself performs and all that hardly matter . sure and this isn not his prime and his voice isn not as strong a usual and but he full of energy and charisma . between the interview and his stage performance and the man come across a be surprisingly intelligent and if a tad egotistical . for anyone who believe in the life affirm power of rock n roll and than this documentary be a must . ( positive ) .