What was said to be the must have FPS game of last year, this was mostly true.
A great game if you are just going on the multiplayer, well that's most people did buy it for right. The changes they have made are absolutely great not changing the actual gameplay much just adding much more stuff to tweak like call signs, emblems, skins. A ton of more weapons, challenges, and equipment. It is full of the same modes with not many changes but there is no need for change. They have basically just got the original game and gave it some fun extras.
Instead of the Nazi Zombies a new mode has been added Special Ops. Which are basically bite size chunks of the campaign. There are three difficulties, you can choose to solo those missions or do them with friends split screen or online. Sadly the difficulty is not toned down when you are trying to solo, so if you want to get all 69 stars you might want to grab a friend.
Overall a great game of 2009.