This film is simply a love letter to the three writers Allen Ginsburg, Jack Kerouac, and William Burroughs. The film offers no dissenting viewpoints, and provides very little evidence to back up its claims that these three men were somehow 'The Source' for all counter culture movements that followed them.
This is a preposterous claim. The Beats were simply part of a long tradition of counter culture art that began in earnest in the mid 19th Century.
Anyways, outside of some sloppy history, the film does at least seem to capture the spirit of who the Beats were. What it fails to do, however, is convince me that I should still actually care who they were. So, for a fan this film will be a joy ride, but for people, like me, who have always been somewhat ambivilant about the Beats, it doesn't do much convincing.