A beautiful, evocative collage composed of concert footage, photographs, interviews and film clips, as well as interviews with people who knew him, the film is a rigorously thorough biography and an impassioned accolade.
Certainly this is worth seeing in theaters. However, you may have to hunt for it, as its distributor plans only a limited release before it hits DVD, where you will be able to skip the dull parts and fast-forward to some of the awesome musical sequences and interviews...
...one wondrous thing about the movie is that, true to its title, it doesn't feel in the least bit nostalgic. At its best, it throbs with immediacy, just as Strummer did.