to me personally, it has the best combat engine/system (or whatever you call it) of any game in the history of games. It just works so easy and it looks so f***ing beautiful.
it's like you'r actually playing through a cut-scene that's how amazing the combat is.
Also the metroid style gameplay is just another fantastic thing about this game.
this is a game, that similar to viewtiful joe, i'll come back every so often because of the satisfying fighting mechanics.