Pros:

-Large map, allows for players to choose where to hold out. Adds variation in gameplay and replayability
-Visually polished. Lots of custom content, all of which is pretty professionally made. No custom content that is too huge and fancy that would bog down people's computers
-Very good recreation. Lots of small and large details, all very intentional details which add to the awesomeness of the map.

Cons:

-The interior playable spaces are a bit cramped and not the funnest to play in, due to the author's focus on recreating a real-life space instead of creating a playable space that works well with L4D2 gameplay
-More of a parking lot survival map instead of anything else. I found myself running out of the interior spaces to give myself some more freedom of movement. I kept getting pinned in the interior spaces and died pretty quickly.
-Can clip through walls in sewers and see skybox
-I personally wish the author deviated from a real-world creation a bit more and used his skills to make a map that worked a bit better with L4D2 gameplay. Other than that, the map is quite awesome!

Conclusion:

Very polished map. Quite large with various places to hold out in for survival gameplay. The author obviously knows what he's doing! Props!