Your partner picked up Crysis 2 for you? If you're haven't already, put a ring on that girl, like yesterday.
But, I really enjoyed the game. Hope you're enjoying it too! I liked how it encourages you to play how you like to play. If you like to run and gun, hit armour mode and go for it. Like stealth? Cloak and you can do that too. You can get in their face with a machine gun or snipe from high ground. The Single Player has it's rough spots, but it's nothing game breaking. The AI when moving about can look a little stupid, but if you de-cloak, they will make Swiss cheese out of your Nanosuit.
The multiplayer is touch and go. It is laggy, even at it's best. It can still be enjoyable though, I have found objective based game types, like 'Crash Site' (A moving 'King of the Hill') is a lot of fun. Requires a bit more thought and teamwork.