I hated that gig last year- The M25 was shut and it took me 6 hours to get there, and ended up in a grubby hole where the first local I saw was pished and staggered up to me and said "Bon Jovi are shit". Nice!
Then all the merchandise ran out in fat bastard size by the time I got there and queued half hour for it, and then our seats turned out to be shockers in line or just behind the stage.

Although I thought Bon Jovis performance was fine, I hated everything else about it and am dreading the return trip next year!