I traded in a bunch of my old crap to get this game and so far it's been totally worth it. The graphics are absolutely phenomenal and the gameplay is a blast. I used to watch the Batman cartoon from the 90's after I got home from school, so the game is made even cooler by the fact that they got the actors from that series (including Mark Hamill as the Joker) to come back and voice the game.
Also, the PS3 version comes with special content... missions you can complete as the Joker, so that should be fun.
Besides running around and smashing things or performing very satisfying combos with fists and knees, the "detective" part of the game is a lot of fun too. Batman's got some special visual filters that allow him to isolate stuff in the environment he can use to help progress the game. For instance, when the Joker kidnaps Commissioner Gordon at the beginning, Batman finds an empty flask at the scene of the crime and with the detective mode, he can analyze the liquor left then follow its vapor signature in the atmosphere to where Gordon is being held.
I'm only about an hour into the game, but so far it is definitely worth checking out if you like comic book games or beat 'em up button mashers.
