Gameplay
The gameplay is excellent. The A.I. is superb, and they react well to every situation. A major improvement over the original is the fact that once you are sighted, it doesn't automatically shift into Caution mode. The soldiers have to radio in a team to search for you, and then if they find you, it will shift. The controls are spot on. After you play the game for 5 minutes the controls just feel right. The story, although very confusing, is excellent. Many people find it ridiculous, but if you try not to take it literally, it's close to epic.
Graphics
All I can say about the graphics is that they are amazing. All cutscenes are done with in-game graphics, and that is proven by the ability to zoomin and move the camera around a bit during the scene. All animations are smooth, and there is no slowdown.
Closing
Well I love this game. I give it 10/10. I'd reccomend renting it first to see if you like the story.