This is the best first person shooter I have played since half life.
I don't give a fuck if its not 'realistic', Every aspect of the game comes together seamlessly to create an incredibly immersive, enjoyable experience. Animations, models, textures, levels are all top notch. Sound effects are some of the best yet, the voice acting is great, a real treat to hear voices that actaully sound they're coming from grizzled soldiers in the heat of battle rather than some pasty game dev reading lines of a script.
Yes its essentially just 'more of the same', but its more of the same done better than anything in a long time.