It is excellent I got it with my superman Collection DVD set I got when it first came out has some really good stuff in it, actually the whole collection is excellent.
I used the link to You Tube and watched the whole thing. It was pretty good overall. The stuff about how Superman was created was good to learn and how the ethos has changed over time. The bits on Smallville were interesting too just a little too short. It said something along the lines that Smallville was approved as long as Clark doesn't fly or wear the cape! Does anyone know if that is true?