I played the open beta last night. This game is pretty good. It's a FPS so basically it's like every other FPS. Has some glitches and some unbalanced weapons but it's overall a really nice game; it runs smoothly most of the time and the shot register is pretty good even with all the laggy players.
IGN is Spun, if anyone else plays.
Mabinogi - Ruairi ch5 - Spliff