Interesting indeed. There is either a lot of love or complete dislike for the game. I suppose that's a good thing.
Sadly, I'm in the dislike camp. I loved the first 20 minutes or so, where everything was dark and creepy, and gave me a really cool sense of place. And then came the plasmids, the respawn tubes, psychopath bullet sponges, and the atmosphere was largely thrown out the window. (not really, because it would drown)
A lot of stuff before you actually encounter a big daddy is a great build-up and I love the tension that is there, but when you finally face that first big daddy, it's frustratingly unforgiving, and no real way of dodging that charged drill attack. A bossfight without a cool way to beat him that makes the player feel cool or smart. Same with that first doctor/plastic surgeon boss, that guy took 3-4 magazines of tommy gun ammo to the face and still ran around shooting.
As of yet, I've not seen any Bioshock 2 footage. The game doesn't seem to be pushed hard marketing wise, mostly haven't even seen a single banner on any of the gaming news websites I frequent. I'm not going out of my way to find stuff, but I've read some of the reviews, and it doesn't encourage me to go pick it up. I guess I'll watch one of my friends play it first.