I've got it on pc and 360 and the pc version seems to be more difficult, but there aren't so many really high level guys, so its good.
Unfortunately you have to use it with Steam, that requires you to have to update it from time to time involuntarily, and it has a huge starting download.
I must admit it did take me a while to get the hang of multiplayer. i seemed to be shoving rockets into people and dying by bullets shortly after repeatedly, usually by the same person. I find the best way is to get a plasma rifle and just sniper from an insanely impossible to reach ledge, providing of course the pros don't shoot you down first.