I wouldn't say that it rocks. I used to think that it'll be good because it's made by Rockstar, now I know that it's not. It feels like Mafia 2 but is more boring and has unbelievable amounts of cash in marketing so the hype is huge making the game so much more disappointing for me.
Get the Witcher 2 or Yakuza 4 if you have a PS3. They are awesome games, both are way above LA Noire.