There's nothing better in a documentary than to have it done by someone that is not only very knowledgeable and involved in the subject, but can also present a unique and original perspective. I will watch any documentary on music but far too often , many of them feel like they were made, just for the sake of being made. This one poses some great questions and either answers them or gives you the tools to get your own answers. Plus it's just nice to see one of rock's most underrated drummers who also is a very funny, interesting guy, for 3 hours. Oh, and also Sting is in it a bit, if you're looking for a little bit of pretentiousness.