It's actually not that great though, especially compared to the KOTOR games. The big problem is that nothing can ever actually change in the world, and the game does a **** job of disguising the fact. I saved the throne of alderaan from the empire last night, but once I go out that green barrier it suddenly hasn't happened anymore.
They can't even have your light / dark choices reflect in the game because it would be too much trouble. Even if you're the most evil character ever, the game insists you're good, because to do otherwise would have been too difficult.
They basically tried to jam one genre into another, and it didn't really work.