I played it a decent amount a while back, but two things turned me off: 1) it was a third person shooter, not first, and the cheaty seeing around corners always seemed like bull to me. And 2) My friends were always seeing targets that I couldn't see, they have monitors higher resolution than my 1080p. So I assume there's some in-game rendering advantage to that. I'm planning to upgrade, but not yet.
I understand there's 1st person only servers now, so I might give it another try.