Pros:

-Reminds of Blood Harvest
-Intense(on any kind of difficulty)
-Nice tricky spot in map 2(The barrels falling down the hill)
-Long maps
-Finale is really fun

Cons:

-More health items spawned,perhaps?
-Similar/same finale as Dead Air
-Umm in the ending scene there are 2 planes flying out?

Conclusion:

A successful combination of Dead Air and Blood Harvest.I can see why L4D1 players love this campaign.The tight paths and all the darkness make this ideal for Versus(please release a version for vs play :) ) and it can dish out some challenge even in modes like Normal and Hard.
A+ for the work, dude.

Pros:

-Jukeboxes :)
-Unexpected crescendo events(Train and plain crash)
-Nicely timed and paced tank spawns
-Nice small cutscene at the end of map 2
-Weapons from "The Passing" DLC
-Nicely detailed car models

Cons:

-FPS drops at times
-(almost) no survivor dialogue
-Haven't seen Boomer Bile anywhere
- A few Bot Al issues(Louis getting boomed and not reacting to the zombies attacking him)but nothing gamebreaking.

Conclusion:

Its a decent campaign.The city theme is getting kinda boring but this is a successful mix of No Mercy and L4D2.
Didn't like that blue light 'round the zombies,but hey:Its only me,probably.

Pros:

-All the most important maps from the original are in the lite version
-Finale is well stocked with supplies
-Filling up a tank with gas :D

Cons:

-Some things that don't belong in diffrent places of this campaign
-Doesn't provide enough challenge in difficulties like Normal and Hard
-Finale gives enormous amount of lag when the tank is completely full with gas and ready to break the baracade.

Conclusion:

You kept the most important from the original but it kinda lost a piece of its epicness.The Back Alleys are still probably the best designed city back streets level in this community though.The lag in the end of the finale is a thing you might wanna take a look at.

Pros:

-Weapon and usable/throwables placement
-Reminds me of No Mercy
-Climbing to the top of the building
-Sewers 
-No bugs/glitching as far as I'm concerned

Cons:

-Confusing times when you get to that car blockade

Conclusion:

A nice little campaign.Doesn't feel Valveish but its still a must have and really fun in both Versus and Co-Op

Pros:

Level Design
Finale
Prison level is amazing
Level theme changes nicely throughout the campaign
A nice amount of throwables
Escape with a balloon
No lag/dropping of FPS

Cons:

Its pretty easy to get killed on the Lighthouse by a Tank or a Charger

Conclusion:

I really like the idea and especially the finale of this campaign.The escape with a balloon thing is bloody genius.