Also, depending on your location the lag might turn you off (it's worst at the beginning though- as you leave the beginner area it improves). I'm in New Zealand and the lag is noticable- you can adapt quickly but it makes it frustrating sometimes to kill monsters and pretty much rules out PvP. If it was any worse, I wouldn't play.
However, monsters don't do bump damage (regular ones anyway) which helps a SHITLOAD with the lag. Unlike MS = you lag you die.
@LakeOfTears I guess the skills are really diverse and flashy from level 1 so it helps make it more interesting on your own. xD