I picked it up at bestbuy, got it via pre-order on monday night. got 250 reward card points, the game, a dvd double feature with mask of the phantasm, a $10 gift card, and used $15 in my own reward card points and paid $45ish for it.
The game is just freakin awesome, I was playing it with the surround sound and it just blew me away. There are some riddler things I've been trying to get but I think you have to go back later to those area to grab those riddler items.
the fighting system is awesome, the stealth stuff is awesome, graphic are sweet, and its a 10 in my book so far.
I haven't played the joker challenges yet, but I don't want to yet because the story mode game is just that good.