I have been playing it for a few weeks, most of my friends are playing it vs Black ops. I like both for different reasons.
BO I like because I only need to rely on 3 other dudes to win a match (if playing on teams) where as BF you are at the mercy of the rest of the team, if they are shity and don't cap areas then things go tits up real quick.
I havent played in a week because of work and re doing the PC setup. but I will be back at it next week.