The first half was incredible, they really should have scored five or six goals.
The second half they relaxed, it really did look like training ground football, minus the passion. They were lucky, in the end, because Villa scored one and weren't far away from a second just a minute later, and if they'd gotten that second goal then it wouldn't have been too far fetched for them to go on and equalise in those last 15 minutes.
In the end, a fairly comfortable win for Arsenal, but they really should have done so much more in the first half. It's that Cygan magic, again.