I played a bit of this on the PS3 a while back, never really got into it because all the twats I play with were all on COD. Now on PC, I've been playing a bit with Levi and Squiggs, and it's fantastic fun. There are still pepole that play like little bitches with their SMAWs and camping, but at least it's good fun enough to tie me over to BF4.
Having said that, last time I spent some proper hours playing an FPS on PC was UT2004, that's about 6 years ago. It's going to take some getting used to the mouse and keyboard again, playing anything other than an FPS I can do reasonable well, but my reaction time sare still a bit on the low side and I always over or undershoot when aiming.
Practice makes perfect I suppose, and this is excellent training for the next bunch of games.
Great fun.