Hi. Was in Red Zone at the O2 London last night, Southside. I loved it, but it depends on what you are after. If you want to get really close to the band, you wont, but if you want to see all the show, grab a place on the far right (facing the walkway stage). Loads of room, beer and wine seller, can leave your spot, go get a drink, people round me very friendly, got back to my spot no problems. A really nice way of seeing the band without getting crushed to bits. Another advantage of red zone is the entry process, you get in around the same time as the first GA people, and you can go into GA if you want, and come and go as you please into the red zone. I'd do it again tonight if I had the chance.