I've seen many documentaries but few have gripped me as this one did. The combination of live action, computer graphics, and scholarly voice-over made it a compelling picture. Unlike many feature films, I didn't even look at the clock to see when it would be over.
The only drawback for me was that some of the science went by a little too quickly. I got the general idea of "the column collapses" but would have liked it to be explored a little more in order to have a more comprehensive view.
The inclusion of artifacts was especially moving, particularly when paired with imagined scenes. Overall this is a great documentary -- we could use more like it!