I've been playing it for a few weeks now, I like it. A nice replacement for my old Day of Defeat: Source addiction. Every weapon is ridiculously OP, you can die from one bullet 90% of the time, and two bullets 10% of the time. I guess if everyone is overpowered, no one will be.
Calling in air strikes as an Officer while a friend plays Radio man is pretty neat. I wish people would branch out into other game modes more often but the player base is 98% Invasion maps.