I played it, too - it came with the console. I didn't finish it, though, because I got FFXIII and then Red Steel 2 - and I don't have a lot of time right now to play games.
The control scheme is a crime. You never really get used to it.
The story is indeed great, and definitely non-linear. I'll respect the no spoiler request, but you probably noticed the trophy/achievement you get for concluding the story with all main characters alive - that alone should tell you something about the way the story can unfold in different ways.
Plus, they need to get working on game merchandise. I want an ARI!
I'm going to finish it sooner or later.
And, as a teaser: I got the Goldfinger! :D