Pros:

Gandalf
LOTR Music
Horses!!
Requires teamwork to survive, and fun with friends.

Cons:

Perhaps add another heavy machine gun in the keep(my opinion)
Another suggestion: one of the npcs could ride one of the horses and charge into the horde of infected(again, just my opinion)

Conclusion:

Best map ever played!  This is just... EPIC!  The cons aren't really big, just some suggestions.

Pros:

-Creative map
-CAR!
-Melee weapons.
-Catapult
-Custom material

Cons:

-Bots lag behind a lot.
-Like Marcusyaho pointed out, melee weapons crash as well as infected, making them look like moving errors.

Conclusion:

Love this map and the melee weapons and the car!  Only problem is that you have to disable this when playing a different map.  Overall great map!

Pros:

Amazing
Animations working fine
Bigger
Grim reaper weapon :D

Cons:

-Could not find any

Conclusion:

This is a fine replacement for the machete!  Love it!

Pros:

-Nice scare events
-Witch crawling on the celing, really freaked me out
-Chatbox typing on it's own
-Voices calling for help.
-Good idea.
-Gave me a scare :D

Cons:

-No direction or any hints, kept getting lost.
-2nd map horde was frustrating 
-Subway and the maze could use more lighting, it was a little to dark for my taste.
-At finale, no clue where the chopper landed
-It could use another map or two, it was short.
-Stone ladders were really hard to see, perhaps add a lamp or a camp fire.

Conclusion:

The 1st map was good, but could use more light.  2nd map needs more directional arrows and  lighting,  it was annoying fighting constant hordes and finding a stone ladder in pitch black darkness!  At finale, no clue where the chopper landed, perhaps maybe add a wall with a hole and walk through a field?

Overall, it was a pretty good map with great ideas!  It actually felt like I was in the ruins of a city.  

Pros:

-Much  brighter than default.
-Helps you see in dark areas.

Cons:

-Blue outline is a little weird...

Conclusion:

Loved this more than the default flashlight!

Pros:

-Crash Course improved and now it is longer
-Military gun fire
-Nasty weather
-L4D2 content
-Intro on map 2 - that's new.
-Lightning actually hit the infected :D
-Bunch of military infected.

Cons:

-Finale was annoying having to restart the generator.. but what the heck it's crash course.
-Bots were dumb, one of them tried to heal while being shot at by military.

Conclusion:

Campaign with a lot of challenge! Storm effects was a good touch!  Keep it up!

Pros:

-Scriped dialogue
-Nice props
-Custom texture

Cons:

-Only map 1 feels like China, maps 2 and 3 sadly lose the feel.
-Chapters are short.
-Campaign could be bigger.
-Finale is cramped in a corner.
-Radio could use a voice.
-Chopper arrives far way from finale spot.
-Also takes pretty long to show up.

Conclusion:

To be honest, this was somewhat okay to me.  The dialogue at the beginning was good along with the China feel on map 1.  Finale was cramped in a small corner and too easy.  

Pros:

-Animations are super!
-Looks great!

Cons:

-None

Conclusion:

Best deagle animations i've seen!  Better than the regular!

Pros:

-This one caught my eye :D.
-Meat leg unlocks minecraft easter egg
-Church was a nice idea to start.
-HL2 npcs in church
-Lot's of places to explore
-Zombie easter egg in pool room.
-Very well detailed and looks very apocalyptic, I actually thought the infection hit Barcelona!
-Shakings throughout the campaign, it actually felt like a warzone.
-Use of a 105mm to blow up concrete blockade.
-Chopper npcs shoot infected at finale for a short time
-Propane tank skin.
-FCB infected :)

Cons:

-Bits of lag, but no biggy.
-Cannot interact with npcs.
-Could use some custom weapons, like a Spanish sword.
-Tier 2 weapons should appear earlier like map 2
-How did a swan boat get in a sewer? No points taken off, just curious
-Subway falling cars part could use a warning like "Watch out for falling cars!"
-FCB infected have square shadows when killed.
-Finale music should start right when you reach the top.

Conclusion:

Wow! I'm impressed with this campaign!  Barcelona looked like it was in ruins and felt like a war was going on.  Shakings throughout the campaign was a nice touch especially the minecraft easter egg!.  Excellent!

Pros:

-Map 1 custom voice on radio
-Gnome Chompski unlocks Portal easter egg on chapter 5 :)
-Football uniform Tank skin!!!
-Great detail
-Nice music mix
-Very optimized
-Finale choppers shoot the infected
-Foam finger.

Cons:

-Gnome Chompski sometimes disappears on me out of nowhere.
-Foam finger has no icon.

Conclusion:

Campaign was professionally made!  Actually looks like something valve would make.  Great campaign!

Pros:

-Chinese setting
-Soldiers that shoot you :D
-Nice witch skin.
-Cola bottles used with cars give you mollies
-Looting corpses
-Finale worked well.
-Katana lodged into a dead body at finale.

Cons:

-On map 2, a smoker pulled me through the wreckage while crawling through it.
-Could use a little more detail
-Needs more melee weapons.

Conclusion:

Overall, a great map!  The custom soldiers was a nice touch to this campaign.  Witch skin was also good to indicate chinese people were infected.  Well done!

Pros:

-Building rockets/fences etc was an excellent idea :D
-Tech tree
-Needs teamwork to survive.

Cons:

-Bots are useless and don't get in the rocket
-Hordes keep coming and coming
-Rocket is small inside (no points taken off)

Conclusion:

A great map to play on!  Introduces a new idea to l4d2 and very creative.