The camera work has the usual claustrophobic box look of most television films. The editing is incredibly choppy, and the continuity is really awful sometimes. There are also clichés in abundance - David Ruffin getting tossed out of a car is pure detective-show melodrama, but doesn't really resolve the whole Ruffin problem in the film. And there's plenty of lag-time, especially in the second half.
All that said, the story is surprisingly very strong, the characters fascinating, the performances energetic, and the music is very well presented. The sense of the historical change of context surrounding the characters is also accurate and convincing, although played quietly (actually works better that way).
The first half especially is a treat. A strong effort to do the group, its music, and its history justice.
