Pros:

Generally a good all around campaign.
It wasn't overly difficult on Normal (More on this in the Conclusion)
Supply placement was good.  I never actually found myself running out of supplies unless I was near a safe room.
Decently lengthy maps.
Some survivor dialogue added here and there.
A classic map (didn't help or hurt the score)
Some events were mildly interesting

Cons:

Felt a little...too long at times.
I found myself getting a little bored of the campaign near the end, mostly because there was nothing really out of the ordinary in the campaign.
An overload of hordes.  Way more than was necessary.
The campaign hasn't aged very well.  Textures look bland and blurry at times.

Conclusion:

A relatively fun campaign, although it gets a little boring near the end, and it never offered anything out of the ordinary.  

Now, on the matter of difficulty.  On occasion I see people on the site complaining about how hard a campaign is "On expert/advanced".  Personally, I always thought this to be a really ridiculous Con.  If a campaign is too difficult on Expert, common sense should tell you to simply lower the difficulty, although it seems that some reviewers seemed to forget that other difficulty levels existed.  

Basically, what I'm trying to say here is that if a campaign is so difficult on a certain difficulty, then simply turn the difficulty down, but don't lower the score of your review over that, as it's unfair to the creator. 

Pros:

The sirens add a feeling of suspense and urgency.
As many people said it can actually scare you at certain points.
It makes fighting the tank far more intense and pulse pounding.
Creates a sense of urgency when you are surrounded by zombies.  The last thing you want to hear in that situation is these sirens going off.

Cons:

It could be a little bit louder.
Maybe add a little bass to it to make it more intense.

Conclusion:

In conclusion the mod is amazing.  Compared to the original tank song, its far more pulse pounding and aggressive than it ever was.  The sense of urgency it creates is simply amazing.  It makes fighting the tank so much better.  The mod is so great it actually brings back those times on L4D1 where I fought the tank for the first time(s).  It was so intense and crazy trying to fight an almost invincible enemy.  This mod brought those times back and I thank you for that.  Anyone wanting a fresh tank fighting experience should download this mod.

Pros:

Very long campaign
Beautiful scenery
Nice view of the sunset and the city at the end
Not to hard not too easy
Good weapon placement
Finale

Cons:

None

Conclusion:

An excellent and well made campaign. It is perfect for anyone looking for a good campaign with excellent crafting!

Pros:

Very large
Alot of gas cans
Alot of ammo supplies
Alot of weapons
Working elevator
Good camping spots
Much detail
Played with the creator!
Night of the living dead movie

Cons:

None really

Conclusion:

This is the perfect survival map for anyone looking for a good challenge with alot of supplies and camping spots. The author obviously put alot of work into this. There are alot of details in this map and is in general the best survival map in l4d2 history. By the way Mr.Pierce if you dont remmember me my name is MK ultra

Pros:

Continues story form the end of L4D2
Ice
Fire
Fire melting ice
Beautiful to look at
Yeti!!!
Decent intro

Cons:

Can be a little hard to figure out at first
Hazy so it can make it easy to get lost

Conclusion:

if you want a campaign that is really good and continues the story of L4D2 then i reccomend this map.

Pros:

Very good remake
Custom music
Custom voices
Nice finale
Decent intro

Cons:

VERY HARD FINALE
not many health kits in finale or anywhere really
helicopter blade
Very hard campaign even on easy
Bad cresendo event when you have to keep the number of infected from reaching 1,000,000

Conclusion:

All in all a really good campaign and remake.  The only real problems is that you made the campaign TOO hard.  Its ok to have a challenge but not one so large that you can't even beat the campaign on easy!