Pros:

-Scale of the finale was awesome
-great setting
-custom infected additions!
-Different ways to make it through each map
-Fun exploration
-Great detail - great events (challenging)
-Had living static characters in beginning (creepy sounds in beginning too!)

Cons:

-A bit short - Need more!!

Conclusion:

It is a great map to give a try.  many very detailed areas, some are ok.  A lot of places/settings you have yet to experience in L4D2!