Pros:

Wonderful level design/locations

Tricky navigations and mazes make it more fun, not annoying

Solid layout with no glitches

Amazing atmosphere

Fog was very cool

Cons:

Too many Special Infected spawns

A few weird panic events

Lack of dialog/npc interaction. 

Midnight Riders?  Ew.

Conclusion:

The fog was so atmospheric, I kept thinking of how cool it was, and how much it reminded me of a good film.  The only downside was the ridiculous amount of jockeys and smokers that kept spawning.  I get annoyed when people complain about navigation troubles.  To me, if you get lost, it makes it more fun and challenging.

I also would have liked to have had more interaction with the AI's or connection.  The finale didn't make much sense to me, and I hate the midnight riders.

Weird panic events such as the old door were silly.  I do enjoy the startling of the crows, however.

Overall, this campaign is very solid, and is well made.  It lacks a few things that keep it from being really standout, but it's still a great ride.

8.6/10