Don't bother with the U.K. version (12 hours) buy the USA version (19.5 hours) it contains more and can usually be found at lower cost.
Covers the birth of jazz, swing era, move to bebop, free modal very well, but there is only scant coverage of more modern moves in the field of jazz.
Mr Burns has argued that he is more of an historian than a critic and as such he can only really deal with the phases of jazz that are from the past. This line of reasoning is, I think, not un-reasonable.
A nice touch on the DVDs is that when a piece of music is playing then pressing the "info" button on the DVD or its handset, brings up a screen about the music being played, e.g. title of music, who wrote it, who is playing, when was it recorded, etc.