What a great location Red Rocks is to film and the film and sound quality is very good. The only thing that spoils this otherwise brilliant film is that the first track Lovers Eyes has a list of tracks that are coming up which lasts half the track and ruins the footage. Then there are documentary clips inbetween the tracks, once you have seen these once they are pointless. When will bands learn that you want to see an uninterupted show to remind you of the concert you saw or the concert you couldn't get tickets for etc etc. The docu stuff should be bonus material. Finally the set list is a bit on the short side.
Having said all this Mumford and Sons are a fantastic Band and this is still a joy to watch.