Pros:

Great music
perfect textures
good paths ( ladders, tunnels, stairs and ramps )

Cons:

the intro music is very stupid but when you blow horn the good music start 
miniguns are boring you can survive infinitive
map is to big
gameplay is wierd, common infected doesnt come to king throne room

Conclusion:

I like the l4d2 version more, this is just laggy and doesnt have defibs although it was fun to explore but gameplay is horrible.

Very fun and easy to defend

Pros:

Custom music from the movie
fun with friends
very easy and enjoyable
Not so much lag for being so damn big!
sick amount of zombies attacking, almost a bit to much I am surprised that this doesn't crash

Cons:

gets boring just like any other survival map :/

I found a smal bug but it dissapear when wall explodes (when I throw molotov on the wall the molotov spinns around and doesnt explode or become fire untill wall explodes)

Conclusion:

Make a campaign instead, I get bored from this survival, only fun is to get better time then others :p

I give 100 because I want to see more of these maps but campaign mode prefered, survival is soulless and dull, but its not anyones fault I suppose.