I just got it yesterday thanks to Blockbuster By Mail.
I really like the setting of the game. The prison/insane asylum is dark and spooky and filled with chills.
Granted the story and characters are rewritten and re-imagined for the game alone. It's kinda like that new show that came out on the WB except for adults, and this one is actually good.
I'm also digging the game-play. Pretty decent fighting engine, with stealth to boot. Makes you think and plan out attacks. Also let's you upgrade your deadliness. This is one of the first games in a long time where I played it for several hours straight without stopping.