Pros:

Interesting Concept
Well planned layout
Decently Challenging
Got the Point Across
Good amount of zombies
Good amount of items and ammo
Decent Versus play

Cons:

Missed real textures. ( I know its a dev map)
No real atmosphere
First Level (Versus)
Finale wasn't as challenging as it could have been

Conclusion:

Although the overall effect of the map is interesting and original, at least as far as l4d2 maps go, I wasn't that impressed by the first level and finale, which are frankly quite important to me. I did love that you  incorporated a running finale in this campaign, those are my favorite, but it wasn't a very interesting or difficult one in versus. The First level on the other hand was just boring, and I wish you had put more love into it then basically a huge spiral slide. Minus 2 points for each level that wasn't up to par with the others.