Having played the original BioShock, but taking a pass on the second installment, I was looking forward to this game. However I was not prepared for quite how good the game is. Playing on PC, it is truly a gorgeous looking game, the the art style perfectly capturing the feel of a city among the clouds. I will not say much more other than I found the combat acceptable if not excellent, but the story was fantastic, and is what will keep you coming back.
Buy this game.