Pros:

+Unique and intense crescendo events
+6 large maps
+Fair amount of detail
+Decent level design, dynamic paths
+Challenging
+Awesome gun store in map 5
+Excellent finale
+Each map had plenty of supplies
+Custom panic events
+Survivor dialogue
+Good atmosphere
+Jimmy Gibbs Junior zombies

Cons:

-Overwhelming at times
-Several areas could use more detail
-Navigation was confusing at some parts
-Not enough variety in the levels, everything looks the same and feels repetitive
-Bots have trouble
-Missing tank music in the finale
-Buggy intro

Conclusion:

A long and challenging campaign, although at times its a little too difficult and starts to get boring halfway through.