Pros:

+All maps included are well-built
+No texture or object errors
+Runs well (little-to-no noticeable lag)

Cons:

-A constant, never-ending onslaught of zombies. Really, this comes down to personal preference, but I was playing on normal, and it seemed absolutely incessant even then. (-0.1 b/c preferences)
-Very generic layouts--nothing that really stands out from the pack. (-0.5)
-Tank at the opening may overwhelm underarmed/surprised parties. (-0.2)

Conclusion:

It is technically well put-together, though I didn't personally care for it. Were it tighter and didn't simply feel like an onslaught campaign, I might enjoy it more.

However, despite my feelings, it is still a very good campaign.