Pros:

Nice and long
Zombies EVERYWHERE!
M1A1 Model
multiple tanks
well placed pipes and mollies
Liked the convoy
Loved the parking garage, reminded me of the repo lot in L4D2
Almost flawless geometry
Well put together

Cons:

Wasn't sure which way to go after the sewer tunnels
Had a "jumpy" stop in a few of the stairwells in the level with the car-alarm/parking garage.

Conclusion:

Excellent map. I've just started playing addon campaigns and this is one of the best.

Any chance of getting the M1A1 model for L4D2 for additional spread the joy mapping?