Mark, after reading your review I wonder how different it is to the original. I didn't like the original either, mainly because it's just a bunch of people talking mostly about stuff I already know, and two and a half frickin' hours long, WAY TOO LONG for what it delivers.
Is the Amiga documentary shorter? Felt to me like they didn't know how to edit the previous one too well. And the least said about over/mis-exposed shots plus discrepancy in sound volumes/recording/editing, the better.