I'm surprised I beat it myself, but that's more due to playing beta 15+ times and starting over 3 times after release (at about 75% through the game) due to major patches and additional content only accessed through a new game.
And with the EE, it'll be time to jump right in all over again! I swear, I have got more of my moneys worth on this game than any other RPG I have played so far.
But at least I can say I beat it once so far. *phew*