Finally got around to watching this.
The editing is excellent, very clever layering of both audio and visual footage.
The one awkward cut I couldn't help but noticing so far was the edit from Bowie at the Grammys when it goes over to Candy Clark, he says "This" then it cuts over.
Aside from that, it's better so far than any BBC4 documentary I've seen - and I mean that as a compliment, as they are modern entertainment documentaries and very well made indeed - I have watched them even when the music discussed does not interest me itself, and I know that is not going to change, but seeing an intelligently made documentary about it is still interesting.
Documentary making like this (i.e. David Bowie is the Man Who Fell to Earth) has the power to convince the unconvinced (say about Bowie, or Roeg / the film) - which is a good thing.