I managed to get 4 tickets for the Saturday, got them about 11am through the O2 AXS site after going through their "Waiting Room" system. Ticketmaster was absolutely useless.
It's a bit of a risk I guess, because as mentioned it could be terrible, but I didnt want to miss out..
Ditto, didn't have any problems with AXS (never used it before).
It could be crap but I couldn't pass up the opportunity to see them live, first chance for me.