Combat arms variation key to success!
However, there is missing something to compete with Counter-Strike. Although Nexon do their best to monitor the game. There are growing problems of hackers. These people use various hacks in order to gain advantage over their opponents. Nexon can't to anything to prevent these incidents without hard evidence. Hacks such as no-recoil, cham, wall-hacks etc. can't really be detected in video evidence leaving Nexon powerless. Although their patches rid of these hacks. A new batch of hacks will be made and available to nearly everyone. Further more, glitches have also been problematic in Combat Arms, incidents include people hiding underground and attacking their above ground opponents rendering them helpless. Hacks and glitches are ruining this game. This is unlike VALVe which has more authority and disciplined monitoring. VALVe takes immediate action with glitches and hacks.
Asides from minor problems and glitches, Combat Arms is an excellent FPS for beginners and even pros. I highly recommend this game.