Pros:

-Extremely detailed maps
-Lots of custom graffiti and encounters
-Lots of scripted stuff
-Custom voices
-Nice long maps
-The style of the game instructions are pretty good

Cons:

-On map 3 the bots have some trouble navigating the ladder
-At some points there actually appears to be too many medkits
-Variety of guns is rather low; didn't get AK till the end

Conclusion:

The maps are all very long and detailed; lots of custom stuff and effort put into the maps. I also liked the game instructions e.g in the finale, the "scavenge the battery!!!" was vibrating like some overexcited kid or something.

Lots of interesting places to explore as well; you're also rewarded for exploring. Maybe thats why I kept getting medkits.

Pros:

-Well designed environments
-Variety in environments is pretty cool, plus some weather changes as well
-Crazy crazy finale, space is given to kite the tanks though, which is good

Cons:

-Really stingy with the ammo. Really really stingy.
-No instruction given for the location of the rescue vehicle in the finale
-Bots were semi-bugged when approaching the finale during the caged ladder

Conclusion:

I really disliked the miserly ammo piles, there were virtually none or very few given in the levels. Guns weren't given either, I ran out of ammo pretty frequently (only managed to save some with melees). Also I didn't see a whiff of the AK throughout the entire game, save for the finale. Finale also didnt have an instruction as to where the APC was.

The levels are very well designed though, the environments and surroundings are all intriguing and cool. Fairly ok-ish spawn of throwables. Coolest part was the finale. 3 tanks at once, really? Managed it though, although the bots all died. Lots of space was given to kite the tanks, which was good. This map is more suitable for multiplayer, given the crazy spawn of gas tanks during the whole campaign. 4.5 stars, but I can't seem to give 4.5 so it'll be 5 here.

Pros:

-Nice unique setting
-There were some cool places to navigate through at the start, doing acrobatics in the first level was pretty novel
-Bots managed to navigate after some difficulty (at least they didnt get stuck or die)
-Quite good resource placement
-Nice contrast in lighting (bright areas followed by dark hallways
-Navigation was quite interesting, i.e jumping from elevator to elevator

Cons:

-Somewhere in the 2nd and 3rd level it got a little boring
-The panic events were rather strange since the horde would come in one swarm at a time, followed by awkward silence while we waited for the next horde
-No finale, a little disappointing
-The ending was quite weird, I think I entered a green room and suddenly im in the helicoptor o.O

Conclusion:

From the 2nd and 3rd map onwards it started getting rather boring since I seemed to be going down hallways or up stairs all the time. Also the hordes were really weird since they came in a swarm, and after it was dispatched there would be around 7 seconds of awkward silence (no music or anything) where nothing happened and we just stuck around waiting for the next horde.

Camping for the lift in the 3rd level was a bit too easy; I just camped in a corner and the hordes never really reached us (playing with bots).

Pros:

-Nice dark atmosphere
-Quite unique prison theme

Cons:

-Ammo piles somewhat excessive
-Medkits also rather excessive; I encountered a set of 4 medkits outside safe rooms in level 2. Sure it was after a tank but the tank wasnt that hard.
-I had lagging issues in the finale when I faced a certain direction (perhaps its the water or my graphics card?) but then again no one seems to have this problem.
-Need to make finale's invisible walls clearer.

Conclusion:

This is a fairly normal map save for the dark atmosphere and prison theme. Resources were quite excessive in places. The finale has ungodly problems with invisible walls; at first the sides of the river had invisible walls (even though there were clearly no trees there, but fine.) After that, the RIVER itself became the invisible wall because I was supposed to climb up the side-banks of the river. The worst part is that I couldnt get up the river easily, its like there are mini invisible blocks everywhere. Not to mention I'm moving slower than the tank behind me due to the water. Would make for a pretty cool race if the invisible walls weren't so painfully blatant.

Instead of a river you could make it into some kind of fjord instead, with higher banks by the side. And make the opening more obvious and not littered with invisible crap. I managed to complete the finale with bots though, it wasnt that hard for me. Oh, I had a tank spawn near the beginning of the first level; that was cool. I like how molotovs were supplied.

Pros:

-Quite a few unique scenarios lying around, e.g an alarmed car that you have to trigger in order to proceed
-Finale was unique and cool; I haven't played a crescendo finale before
-Finale was pretty well balanced; lots of room to kite the tank
-Ammo and resources were well balanced as well, though could use more pills/adrenaline as a 'reward' for exploring

Cons:

-First map was rather bland
-First map didnt have any tanks/witches, and was too easy; my team had 90+ health
-Atmosphere was the same throughout; a tad dull at times

Conclusion:

Very good campaign, I cant remember where but there were quite a few unique scenarios created in the game. Resources were pretty well balanced as well. Only thing was that the first map was pretty dull.

Pros:

Hilarious
Easier to hear chargers now, the dialogue is very distinct (could be a con depending on how you see it)

Cons:

If the charger doesnt find you or die soon, you're going to get lots of 'CHOCOLATE? CHOCOLATE?' all the time, could be a tad annoying

Conclusion:

Really hilarious. I've been using this a long time. The CHOCOLAAAAAAATE when he does the charge is the best.

Pros:

-Almost every map had a unique gauntlet/crescendo event (pulling out an axe, setting fire to the newspaper) even one part where you used c4 to "open the saferoom door".
-Graffiti was highly interesting, effort obviously put in.
-Not too difficult
-Plenty of exploration
-Not sure if this is a "Pro", there were some reused textures(?) from the original campaigns which were used quite well. (I was like @_@ this is from nomercy)

Cons:

-Second map seemed rather easy compared to the others
-Some parts were quite confusing (burning office couldnt see shit)
-I hated the dark forest >_> thats just me though.
-Small thing: the part where you use the c4 to exit the safehouse, logically that should have attracted some zombies at least.

Conclusion:

Loved the graffiti. Overall a fun and unique map. Many novel actions and events other than the usual "activate something and off some random alarm shit" all the time. Second map could do with some additional spawns though; the supermarket part was quite peaceful.

Pros:

-Wonderful buildings and scenary
-Doesn't feed you with ammo so you can't go all trigger happy all the time
-I probably ran a dozen miles in the finale
-All the rubble and fire really adds to the apocalyptic feel

Cons:

-AI was a bit more dumb in this map
-Spamming hordes in the finale; didnt let me admire the view :(

Conclusion:

Each map is rather long, though i kinda like it that way. Also, you'll have to conserve ammo, its not given too freely in this campaign. All the rubble and burning buildings really make me feel like its a zombie apocalypse, even more than l4d's original maps.