From the review:
"Probably the largest fault with BioShock 2 isn't a problem with the game itself; it is simply the fact that it can't quite live up to its predecessor. While it is like the first game in so many ways, the overall experience isn't quite the same because that feeling of entering Rapture for the first time can't be recreated. We already know what to expect, so the city is no longer scary or mysterious to us, which can be rather disappointing because that was one of the most poignant things about BioShock. You can't help but go through the game just knowing that they're going to throw a huge curveball your way at some point."