Pros:

AMAZING New concept to the game
Building your own fort is very fun!
LOTS of ways to kill zombies
Amazing special features 
Cool defensive maps

Cons:

Some bugs while putting down items (Sandbox)
Turrets kill team mates including yourself 

Conclusion:

Overall amazing new way to play survival! very fun indeed. Calling air support to kill zombies is a fun new way to kill. Same as all the other amazing things to do! Keep up the good work!

Pros:

Liked the UFO's
Gnome was a cool addition
LOTS of zombie hordes
Sliding through shaft was cool
Ending was awesome

Cons:

Lack of ammo piles 
Sometimes hordes can be really difficult 

Conclusion:

Very fun map most replayed custom map so far that I have played. Keep up the creativity!

Pros:

Very dark, 
Something new
Lots of water
Lots of hights

Cons:

Too short 
Finale was kind of dull
Too many health kits, made it too easy

Conclusion:

Very nice map, loved the new feel. Have not played many maps that are as dark as this. But at the same time to easy and too short

Pros:

-Nice basic maps with some cool features.
-Cool tank spawns.
-Level 4 had a bit of a scavenge feel.
-Ending had some nice camping spots and weapons.
-Multiple ways to go on some levels.
-Small download size for 5 maps

Cons:

-No custom dialogue.
-Bots fail to enter the safe room in the first level
-Tanks seem to spawn same place everytime
-Level 4 should have had more cans to put in for fuel (My opinion)
-Glitched ladders killed me my first try
-Not many melee weapons

Conclusion:

Its a fun campaign especially since the download size is small. People should defiantly check this map out