I didn't even really like the first one, but the co-op is a hell of a fun time, so I figured I'd give this one a shot, too. Got to Chapter 3 with a friend online, had to retire for the evening, and have not been able to join each other's room since.
"Connection to the game you have tried to join could not be established."
The story is bland, and much shorter than the original. The characters are two-dimensional and uninteresting. The villain is unbelievably ridiculous. And while the graphics do look stunning, if you take a closer look at pretty much anything, you start to see shoddiness--some static props are floating, flowers don't blow in the wind, etc. Really, the only thing going for this game was the co-op gameplay. The actual fighting of zombies is a challenge and feels like a life-or-death situation, no matter how pimped-out your weapons are. It's very intense and enjoyable. If only the programming bugs would let me get to that point. I'm just fortunate that I experienced these issues before buying the game, thanks to a free weekend of Steam. This headache is not worth money.