Played some of the multiplayer last night, great fun. In a way it's a perfect fit alongside the BF series. Whereas BF has concentrated more on large scale battles and more tactical play this game is more about barrelling in and quickly hunting down enemies to shoot.
The whole wall running mechanic is brilliantly implemented, a quick scan of an area can show up a number of routes to get to the same point. I had a great kill yesterday where I double jumped through a window, ran to the other side of the building, jumped out onto a wall and ran along the side of it, alternating with jumping on a wall opposite before jumping through another window and then doing a knee slide just before I got to a corridor before facing sideways and shooting someone as a carried on sliding past the doorway!