At least he had a go, he documented all of those artists, half of them have died since and if he hadn't done it, there'd be no record that half of them even existed. I don't like a lot of the backing tracks, the drum samples etc but that film gets better every time you watch it, seriously. I watched about 2 hours of it last night so it's still fresh in my mind, and I was one of, if not the, biggest detractor of the film when it came out.
Ian Levine should be knighted for his services to soul music on the basis of this film alone.