The thing that bugs me is that they did what's usually done with silent movies and ran it at the wrong frame rate. Cameras and projectors had a lower frame rate at the time, so when films from that time are played back at more modern, higher frame rates, they get that jerky, sped-up effect. If the goal was to reconstruct the original experience as closely as possible, they should've run it at the proper frame rate (and had the score performed at the appropriate tempo). Of course, that would've made it run even longer, but I wouldn't have minded; I found that I didn't get bored and it seemed to go by rather quickly.
I was disappointed that the documentary was only about the restoration. I wasn't willing to stay up so late for that, especially on the day the clocks fell back and it would've kept me up an hour later relative to what I'm used to. I was hoping for a documentary about the making of the film itself, particularly the special effects. There was some masterful work there, remarkable for the era and holding up pretty well even today.
