Pros:

+ Originality of voice acting
+ A variety of new "scenes" such as:
        The Bombing of the Runway
        The Monorail Track
+ Picturesque Landscape
+ A simplistic story line that is understandable
+ Creative level space (especially the accent to the chopper in Map 5)
+ 3D text that shows you what to do next.

Cons:

- Some minor navigational issues with the infected in Map 2 and Map 5, but these are hardly noticeable (-0.0)
- Despite the creative level space, I felt most areas were lacking detail. I'm one for realism and I felt as if most, if not all the rooms could have more decals/overlays, greater lighting effects, and not so repetitive model placement. (-1.2)
- In the finalle, the bots can die VERY easily. After playing twice by myself I could only save myself, and with my friend we could only save ourselves no matter how hard we tried to save them. (-0.4)
- While some panic events were exciting, most lacked reasoning (i.e. no explosions had gone off/doors had not been opened) which confused me slightly. (-0.3)
- Tank spawns could be hugely improved, as they could be taken out within seconds without laying a finger on the survivors. (-0.2)

Conclusion:

Potential. That's the key word here. This map could be up there with several other famous custom campaigns if updated and strenuously worked on. The idea is fantastic. The execution is good, but the result could be better. The voice acting was enthusiastic at some moments, but dull at others. I suggest overlooking some of those lines. All in all, I would love to see this reworked and turned into a master campaign with the likes of I Hate Mountains 3, Urban Flight or Vienna Calling 2!