Pros:

-Excellent atmosphere.
-New mechanics (making pipe bombs, molotovs, using health machines)
-Alternative pathing
-Nice environments

Cons:

-Finale was a bit dull. Was expecting to fight the giant tank. 
-Bots fell off the raft. 
-Water isn't deep enough to kill you so bots just limped along at the bottom.
-Health machines were supposed to have a cooldown but it seemed I could keep retrieving health from them. Should limit it to one use per player for better versus balance. 
-Endless hordes and triggered hordes (just by walking? ) at various points detracted from the map for me.

Conclusion:

Excellent campaign that needs a few tweaks to become one of the best custom campaigns available.

Pros:

An ok campaign. 
Unique settings.

Cons:

The scaling is completely off. 
Everything is spelled out for you.
Expect to spend lots of time traversing large open spaces from point A to B. 
Bad voice acting.

Conclusion:

There wasn't really anything about this campaign that stuck out to me other than the flaws.

Pros:

Nice detail

Cons:

Too many random tank spawns, especially early in maps.

Conclusion:

I didn't play through the entire campaign. I wasn't impressed by the map design in the first couple of levels. 

The immediate tank spawn on the first level was a bit of a turn off...

Pros:

Solid campaign.
Easy navigation.
Great map design.

Cons:

Difficult finale on higher levels of difficulty.
Would have been nice to see it built for vs as well. 
Navigating through the cruise liner was a bit boring.

Conclusion:

Great campaign with enough variety to keep it interesting.

Pros:

Great atmosphere.
Nice custom content. 
Interesting events.

Cons:

Dark.
Difficult to navigate at parts.
Lots of common / hordes, when combined with the extreme darkness its almost a bit much.

Conclusion:

An ok campaign but I felt more like I was trudging through a campaign instead of enjoying one.

Pros:

Quality atmosphere, dark and moody.
Good campaign.

Cons:

Nothing unique. 
Navigation.

Conclusion:

Fun outdoors campaign. If you like night time maps then I recommend trying this one out.

Pros:

Unique campaign.
First three maps were well detailed and nice to look at. 
Good attention to detail.

Cons:

Map design didn't allow for a lot of  exploration. You were mostly routed from hallway to hallway or room to room. 
The finale was pretty terrible. The color changes, the lack of weapons, and the lack of an ammo pile (unless I missed it) is quite an oversight.

Conclusion:

A good campaign but not one I will revisit often.

Pros:

Different...

Cons:

Copy / Paste / Copy / Paste.
Bunch of blocked off areas. 
Bland environment. 
Corridor based gameplay. 
Low resolution textures. 
Bad lighting.

Conclusion:

Good attempt but I didn't find many redeeming qualities to this campaign.

Pros:

Great atmosphere. 
Fairly easy to navigate. 
The tank can punch around the globe from the statue!
Good item placement.

Cons:

Doesn't work well in versus due to the amount of narrow corridors, stairwells and instant death locations.
Finale was ooook.
The wind on the helicopter platform is a bit annoying.

Conclusion:

A decent campaign but not one I will return to very often.

Pros:

Excellent Layout.
Well balanced for versus.
Great supply distribution.
Enjoyed the finale. 
Great attention to detail.

Cons:

Environment could use some variety.

Conclusion:

Great campaign and one of the few I have found that play well on versus. Author is very responsive on the workshop. He is taking input and plans to update the map based upon feedback.