I've voted this one a 7, as to my mind - great gig though it was, it missed the other members of Floyd badly.
The cast of thousands did a superb job however, and the event was visually stunning.
I think that you probably had to have been there to get maximum benefit from the show.
I remember the concert transmitted live form an italian tv broadcast, and, really sad, some stuff was played in playback (just look the bass player during Hey You performance. The sound of the bass came from a fretless, thought he played a fretted one)