I think for the average non-guitar playing person who is interested in music it's good. The AC30 is far and away the icon of Vox, from a guitarists perspective I can see where you're coming from though.Well, it was an interesting but kinda dissapointing documentary. Gives you an impression that several decades of history could be summed to just a single product, the AC30. It's kinda dissapointing thought and completely belittles the work several Vox designers did along the years. Vox was way more than just AC30.
...Not to mention, while they obsessively focus on AC30 alone they still completely forgot to mention all the various revisions and development phases even that amp went through during the entire history of Vox. For example, the amp first appeared as a single-speaker, tweed covered combo, and why didn't anyone mention things like top boost units?
So yeah, despite presenting some interesting tidbits of history and footage the documentary was overall sort of a failure, IMO.