I have the 360 version of this and it IS fantastic. I've had minor issues but only once or twice where banisters don't appear or a car pops into view or the skyscrapers just appear in the distance.
None of this has detracted from the joy of the game. I've seen the PS3 version running and it looks awesome and by all counts there's a lot less of the very minor things I've experienced.
Anyway, the worst thing about the 360 version is that fkn fan in the 360. It really is obtrusive and more so that for any other game I've noticed - if I didn't have friends who have the 360 version I would be swapping it for the PS3 one.