If you liked the first you will like this one.
It has a new story line but I liked the first one better but we are here to play so…The story will take you about 6 to 8 hours depending how good you are. They still have the weapons upgrading but with a lot more barrels, paint, clip mags, etc. You now can switch and buy guns just about anytime you want to. The weapons are more modern like stuff you saw in future weapons. They have added a button that gives you the option of looking over the left or right shoulder. Which helps a lot but you may still run into problems from time to time with the camera.The partner A.I. is greatly improved from the first game. So your partner will not be dragging you around all over the map (still he does from time to time). It is a good face lift and improvement from the first one.
Multi-
This is not so good most of the maps lag really bad but I'm sure they will fix that. There are a couple modes TDM, Flag, Demolition and more of the basic ones. You can't take any weapons from you solo though, Boo! They have kits and that is what you get too bad. They do have a game called extraction which is like horde expect for one thing…It sucks! The map is very small basically you find a position and sit there waiting for the waves. But when your team beats the wave you don't respawn you are out for the game or next section. The A.I. in this is truly sad no really, they don't take cover they just come banzi charging at you. It is like a bunch of Storm troopers just got off the short bus, I saw a better A.I. killing Nazi Zombies. But they do have a split screen and you can play the campaign online with other people or a friend which is nice. Still the multi player seems to be an after thought when they made this game.
Verdict-
If you like the story mode and that is what you want it for this will be a win, buy it. But if you were like me and wanted it for the story mode and the multi for the replay value like MW2 forget it, rent it.