If you are not familiar with Buster Keaton, I guess this is not a bad place to start. However, unlike it's subject matter, this documentary is quite mediocre. In this age of great documentaries, this one still starts and ends in a traditional way - by starting with Buster's birth, career, etc. Even structurally, the docu is not well thought-out, suddenly showing a greatest-hits type compilation at the end, after having finished Buster's life story with his death. It has nothing new to add or show, except a few talking heads on what Buster meant to them. Most of these had either no connection to Buster, or they are not appropriate people to speak to (I mean, do you really care what Johnny Knoxville thinks of Buster Keaton?) It's a pretty lazy piece of film-making that is also not very well-researched.If you can, try to catch the three-part 1987 British docu called "Buster Keaton: A Hard Act to Follow".