I just got the game for Christmas
LOADS of fun both SP and MP-wise
I'm actually getting pretty good, can usually take out opponents who have bigger guns than me. It's just too funny to watch some guy with an AA fire it at close range and blow us both up, or to see "WTF?!" in the chat channels right after melee-ing an unsuspecting sniper from behind.
If anyone here is offering clan recruitment or lessons I'm open and would like to learn more.