Pros:

Really nice level design!
Nice Campaign length
Not to Difficult
Really Fun to Play on.
Flowed Really well.

Cons:

On the finale, the AI did get stuck in the ladder section...
Some of the weapons spawned floating in the air.

Conclusion:

Really fun map to play through and it was face paced. Now I really love the map with the standard textures (It's a guilty pleasure when it comes to Left 4 Dead maps...), but I can see where the other reviewers are coming from. With some added textures, I'm sure this could become an excellent map!