Garcia spent a ton of time editing (read learning to edit) the film. I believe it shows some of the best, up-close footage of the band playing and interacting on stage. In its time, it was a mindblower (At the time, there hadn't been a lot of concerts filmed with a large number of camera angles and sophisticated sound production.). From those perspectives, a triumph. IMO, the overall (meaning, yes, I love Sugar Mag.) songs chosen, did not represented the highest energy the Dead were capable of. Nonetheless, I own the VHS and am debating whether to get the DVD. On the whole - I like The Closing of Winterland DVDs better.
I, too was captivated by the very brief cut in the GD Movie where Lesh shows off the Alembic, playing a few notes and a very cool feedback spot while the stage crew is completing set up. I had seen him playing that bass many times, but the first closeup view I got of the wood, the inlays and the (could it have been more of a unique and dramatic departure from the basses of that time?) omega tail. Chalk it up as another instance where I knew I'd eventually own an Alembic Series 2 (Cut to Waynes World: ...It will be mine. It WILL be mine...).
Bill