Pros:

-Good looking map

-A nice variety of things to interact with

-Walt Disney's sniper is amazing.

-A nice variety in each of the chapters

-The Splash Mountain is a pretty interesting ride, and the survivors screaming and laughing was a creative and funny idea.

-Creative finale.

Cons:

-Slight difficulty in finding out where to go at some points, but it only ever took a minute or two of searching.

-At some points, slightly too easy due to a fairly open map and a small amount of any infected.

Conclusion:

Very creative, cute, and replayable campaign.

Pros:

-Pretty good looking model
-HUD as well as Character model
-Funny idea

Cons:

-The health pack barely floats off of his back.

Conclusion:

I know it seems like a big statement, but this is by far my favorite Louis skin. Seeing C.J. run around chopping up zombies with a chainsaw is one of the funniest things I've ever seen in this game. It also really adds an even greater feeling of variety in the group. 

Pros:

-The first map is beautiful
-The second and third map still have a futuristic feel to them.
-Decent length
-The custom music sounds nice

Cons:

-Bots had a hard time trying to climb on the ledge
-The difficulty really only spawned from tanks spawning with infected.
-The second and third maps are repetitive.
-The finale was pretty difficult since it practically followed  a full chapter itself, and then it doesn't give you health. It also spawns tanks with commons.
-The ending scene was pretty disappointing. I'm not sure if you were trying to get some negative emotion from it, but L4D2 isn't really a game that'd make a person cry. It just kinda irritates me that I fought to survive just to possibly die in a helicopter crash that comes absolutely out of nowhere.

Conclusion:

I think the campaign is very good looking. Even the parts that other people seem to say are bland I can still see the futuristic feel in it. However, I think some parts are pretty repetitive. I also think the ending is unnecessarily abrupt in the fact that you go from elevator to helicopter. Then the helicopter seemingly crashes for no reason at all. 

Pros:

Everything
is
Nigel
Thornberry

Cons:

None

Conclusion:

I'm honestly surprised I didn't see this earlier. This is amazing.

Pros:

-I thought it was cool being put in different rooms and thestory with everyone being different test subjects.
-A decent amount of health and ammo
-A good looking map
-Occasionally challenging, I love having to climb the pipes to get into the broken window
-The finale is actually fun.
-The custom poster is pretty cool.
-Dat escape vehicle.

Cons:

-Getting lost was common, and some parts seemed repetitive.
-Once the escape vehicle can be seen, things get too hard. The tanks spawn WAY too far up.
-Some doors shouldn't be there (risked my life with a witch to find out the door she was blocking wasn't openable)
-The part of the finale with the exploding barrels was probably the only time I've ever seen a bot get a friendly fire incident. And they did it at least 3 times each. Meaning too many fire barrels in that one room.

Conclusion:

I love this campaign. It's fun, repayable, interesting, and it all is paid off with the best finale ending ever.

Pros:

Custom Music
Great use of l4d1 cast and their dialogue
Looks very run down and realistic
Fun and interesting crescendo events
Cool (and brutal) custom weapons
Very explorable map
Good map length
Surprisingly not repetitive
Great sounding custom music
Decent voice acting

Cons:

Finale chapter, there's a pile of rocks where a smoker can pull you back and insta kill you (It happens with bots, so i won't really blame you for bot stupidity)

The tank can spawn way too close when running to the escape vehicle, and considering the fact that you almost forced to hit a dead end to escape doesn't help.

Conclusion:

This campaign was probably the most realistic campaign I've ever played. The environment looked a lot like a rundown place would look during an apocalypse, and it was perfect for setting up a depressing campaign. It was a very surprising thing that this map wasn't repetitive, considering a lot of it was just woods and industrial areas. The whole thing was fun to play, the crescendos were interesting and creative, the conversations between characters was pretty cool, it wasn't too hard or too easy. I'm also majorly impressed with the way the map is highly explorable, yet not too easy to get lost in.

I think my only problem was the tank spawns when running to the escape vehicle. But I can easily look over something so petty since the map is good looking and fun enough that'd I'd play it a lot.