Nice game to tide over till BF3...
This is a very immersible miltary shooter. I feel the intensity everytime I play online.
When I fire from inside a building, I can hear the echo of the shot through the room, and the echo from the shell casings hitting the ground. Footsteps also play a big part to me, when someone (an enemy) is sprinting near you, the footsteps give them away.
The entire environment is destructible. Buildings, trees, bridges, even grenades and mortar strikes make craters in the ground.
All in all, this game will definitely get you hooked till the next big release from DICE, namely, Battlefield 3.