Great for studying Japanese
First of all, FFXIII is an outstanding game that tells a thrilling story, and requires quick thinking and careful strategy to play well. Forget whatever you've heard about "just mash X"--that will keep you alive for the first couple hours, but after that you've got to plan ahead and strategize to survive.
I already finished the US version, so I bought the Asian version (Japanese voices, subs, and menus) to work on my Japanese language skills. I can read and understand basic Japanese, but FF requires deep knowledge of written and spoken Japanese. I would have been completely lost had I not played the US version first. But I'm still really enjoying the game a second time.
I do wish it created a second set of Trophies for me, but that's a small complaint. Five stars, two thumbs up, whatever. This is a fantastic game.