Pros:

 + Very fun.
 + Supplies are well placed, so you don't run out of ammo if you have common sense.
 + Bots pick up items, which seems to be rare upon Custom Campaigns/Maps
 + The setting of it was very well-done.

Cons:

 - Infected tend to ignore you when your in plain sight.
 - Roll-up door button requires a few presses to activate.
 - At the rescue, Rochelle and Nick wouldn't move from the lower trailer where the radio is.

Conclusion:

Very fun map. I recommend it. You still have your glitches, but you can't exterminate them all. I give this a 93.