Picked up my copy in LA about 3 hours ago. I have put about 90 minutes into it so far. I am liking the game so far I must say, judging by the Xbox videos I have seen compared to playing the PS3 version I wish I had gotten it on 360 (the store was not selling 360 versions yet). I am getting a lot of slow down on the PS3 version with dips into what seems like 18 - 20 fps fairly regularly. If you have both systems, at this point I would suggest the 360 version.
What PS3 do you have?