I played the 360 demo the day it came out on the 360. While impressed by the gameplay, the graphics, the atmosphere is amazing, and it has no doubt the best opening scene in gaming since the mono-rail ride in hl1. The game just doesn't live up to being the "spirtual sucessor" of the System Shock series, because it lacks where SS kicked ass and that's in the scare department. Nothing is scary in this game, creepy, or unnerving. It's like I was playing F.E.A.R again, patiently waiting till I got a scare that never came
All this based on the first 3-4% of the game... smoooth.
On Gamerankings this game is listed as the second best game of all time, now I don't really go by those rankings but still this game to me looks overhyped and despite being a great game is hardly one of the best of all time-
That's just my first impression
This is one of the best games ever made. The idea is stunning and the setting is incredible. Never has a world ever been so thought out and filled with detail.