I am surprised that I am the first to reply to this topic because this is such an freakin' awesome game. After getting on release day (2/28/06) it only took me slightly over eight months to beat it. Yes, I finally beat Black on normal mode, Chris. With the family gone today I had a good amount of time to dedicate to beating the final level.
As I have said before with awesome voice acting this game is right up there with Metal Gear Solid. I am definitely looking forward to the sequel. To those who have beat it you'll have to say that the ending was left with a sequel in the books.
The gun models are the best I have ever seen in a game, truly amazing. All this and an impressive AI to boot.