From the preview:
"Trees crack and splinter as bullets rake through them. You scramble for cover, abandoning your spot. The house you dive into seems like a safe haven until the wall in-front of you collapses under the rocket of an RPG, leaving you spraying rounds into the rubble filled mist, panicking and confused. All the while the biggest grin fills your face. This is nuts.
That was my first impression of the Battlefield: Bad Company 2 beta. Chaotic, yet great fun. But it's a very tactical game, something that is not obvious at first, with all your team-mates either camping back, sniping or charging forward recklessly. But once you get a good balance of classes and squads worked out, the games run more smoothly."