I bought this game as a fan of the series, going right back to the Snes classic. I was worried though, as the game was released before the various reviewing crowds had a chance to cast their opinion on it - normally this means a game is below par.
However, on the day of release I went out and bought it and upon playing it to death for 4 days I have to report I am quietly smug with the game.
The single player campaign is long, it took me about 9 hours. However, most of the time you spend lost on a huge map, so I suppose replaying it would take less time as you know better where to go/what to do. The unlockable achievements are a bit stingy on the single player campaign if you wizz through it. But if you take you time and find all the hidden items (gold, tombs and info etc) then you are rewarded for that as well.
Online is frustrating, but which shooter isn't? The American servers always make it harder for the UK lads to compete, it always seems harder to drop a Yank online player than it is for him to kill us Brits with one/two shots! The online maps are quite large as well, which is good.
The graphics arn't as bad as some people on here are making out, infact in some places they are really good.
Overall, if you like the COD games and you fancy a change - give this a blast, you won't be sorry!