Summary: Bought on the strength of the reviews, but, having played it, think Tom Clancy's Splinter Cell: Conviction (Xbox 360) is a better game than this, if you want a stealthy FPS as opposed to an all out blast. Like the idea of the game - played and enjoyed the original on PC when it came out - but this version is definitely showing it's age. The movement is at times clunky when compared to more recent Xbox 360 games.
Summary: DO NOT BUY THIS GAME! Or at least wait until you can get a copy for a tenner from a second hand shop or off the white lable/bargain bin. I am no hardened gamer yet I finished it in about 10 hours, and that was with starting on hard level. Whilst without doubt the game looks beautiful, the levels are tiny and the puzzles element at best average. Replay value is almost nil.