Pros:

-Great detail very believable.

-Map is playable in Co op and survival mode.

-Strong use of  capillary areas in both game modes. 

-Playable at night or daytime

-Director has a lot of areas that it can use to block and redirect the player in the map.

 

Cons:

-Map is very short for Co op.

-Some players will get lost in Co op mode.

-The Credits at the end don't show your stats and are to long and can't be skipped with out just leaving the game.

Conclusion:

Normally survival maps are very boring but this ones use of capillary and detail make it more interesting. I loved the use of the directors ability to alter the level and I feel this is the biggest most exciting part of L4D2 and it's almost used but valve and custom map makers.