As good as the first.
Presentation: The opening sequence is fun to watch and the main menu is exactly like the original so it's simple to navigate your way through.
Graphics: The Source engine looks as great as ever.
Gameplay: It's smooth and fun, just like the original but now you can slice and smash zombies to your heart's content.
Sound: Ellis, shut up. The voice acting is great and the soundtrack is there to spook you. The weapon sounds are awesome. And the zombies sound like as much like the real deal as we know... for now.
Lasting Appeal: It's fun to play over and over again because the AI Director will change the level and enemies according to how well you're playing. There's different game modes for more fun.