Had a good few rounds with Zargon. The game is pretty tight. Graphics are good but definitely a different, darker feel than BC2. Love the burned out level and the rice paddy level. FPS is solid - a bit higher than BC2, and much more constant - I was getting 61-69 FPS, no spikes.
As for weapons...love the crack of the m16. And that m79 Bloop Tube - not too precise but oh so much fun when you have Charlie pinned down. Flamethrower I'm not so sure about yet...only good in the really CQC areas, of which there are only a few.
Oh yeah, and after 8 months of trying, I finally got my naval warfare pin after about 30 seconds on the gun of a patrol boat. Just shows how stupid the grenade launcher on the vanilla BC2 boats is.