Pros:

The Portal 2 Easter-Egg, the best Easter-Egg in a game;
Skin for the tanks of the Chapter 5;
The exclusive sounds and musics of this campaign;
Scenario;
A new melee weapon, found in the stadium;
Long Campaign;
Enough zombies. 

Cons:

Shit, i didn't have any cons to say.

Conclusion:

Awesome Campaign. Masterpiece. i'm impressed with it. At the first look, you think it's a Valve's campaign, but isn't. This Campaign is the best custom map ever made for Left 4 Dead 2. I Recommend this for the guys who love the L4D games and the Portal 2 Game (Because of the Easter-Egg). They will love it.

Pros:

Mario Theme;
Breaking blocks for take items.

Cons:

Little Bugs;
Bots are stupid some times;
The finale.

Conclusion:

Its a very fun campaign, but the finale is disappointing.

Pros:

The references of the remake and the original Resident Evil;
The creepy atmosphere of the Spencer Mansion;
The Puzzles and the traps;
Scarce items, the spirit of the first Resident Evil games.

Cons:

BUUUUUUUUUUUUUUUGS;
No  campaign poster;
Campaign looks unfinished, abandoned;
Things who used to make certain use in the progress of the campaign, just like the Piano,  are not usable.

Conclusion:

I think the only thing who save this campaign its the Resident Evil spirit in there.

Pros:

The great skins for the special infected;
Scenario and Atmosphere;
Skins for the survivors;
Some small references to Silent Hill 2.

Cons:

Stupid bots.

Conclusion:

One of the best custom campaigns for Left 4 Dead 2. The True Silent Hill spirit is here.