Not much to say that hasn't already been said. Extremely detailed and very informative. I love the candid moments of the cast in crew in the behind-the-scenes footage, as well as comparisons to how the scripts were revised.
I did notice a couple video glitches during transitions that could have been smoother. Also, one major audio glitch where Mark Hamill is talking about something, but the stereo tracks aren't matched creating a really bad echo. This glitch made what he was saying almost impossible to understand.
Overall enlightening and very entertaining. Kudos!
While not quite the mythical and surreal act of filmmaking serendipity that the original Star Wars was, the story of Empire Strikes Back is just as compelling, due to the unlikelihood of the movie actually turning out to be good. Lots of fascinating BTS footage and facts while you still get to enjoy one of the great popcorn flicks of all time. Essential viewing for any and all Star Wars obsessives.