Pros:

-Not a run and gun campaign
-Even more detail then a Valve map
-Fun
-Long
-Challenging

Cons:

-Not a run and gun campaign
-Can be dark at times
-Got lost sometimes (that could be my noobiness kicking in)

Conclusion:

Alright, so let me say this. BEST CUSTOM MAP EVER. This has so much detail its mind blowing! Now to state out my pros and cons. First, I realise I put "Not a run and gun campaign" and both Pros and Cons, and I did that for a reason. It's a pro cause from day 1 I wish Left 4 Dead was more of a zombie game resident evil style, rather then "K GUYZ WE GUNN SHOOT AND RUN 2 SAFE RUME". But it's a con because sadly Left 4 Dead is a run and gun game. It is fun, and there are a few puzzles. And it is long. I'm giving it a 8.