Pros:

Not much

Cons:

Poor AI means that its hard to get through in single player. On the first map, Francis refused to move into the safe room until I threw a molotov at him.
Plenty of parts with empty textures, not missing, simply not there.
Dull and repetitive.
Impossible to know where you are meant to go sometimes. I spent about 20 mins on level 2 trying to find some way to mve on, to no avail. There simply isn't enough telling where you need to go.

Conclusion:

Needs A LOT of work.

Pros:

Exceptionally original
Amazing ideas
Well made all the way through
Plenty of variety in textures
Wonderful finales at the end of each level.

Cons:

A little to hard for newbies
Very dark in the first level
A little repetitive in places
Easy to get lost

Conclusion:

One of the best maps out there. Simple play it to get the feel of one of the best maps to come out.

Pros:

Excellent Detail
Exciting Map
No glitches

Cons:

Not exactly realistic (An unmanned balloon is activated by a lighthouse? Someone makes a safehouse in a cargo container?)
On 2nd level, a horde after the sewer pipe area will mean the horde goes through it, instead of up the side of the wall.

Conclusion:

Epic map, not very realistic, but still lots of fun to play.

Pros:

Very, very realistic.
Very fun.
Great idea.

Cons:

Some bits are slightly buggy
Why would you go on a rollercoaster during a zombie apocalypse? (slight problem keeping with realism).
Gas cans a bit to far spread - add some more or put them closer together

Conclusion:

Epic map. Lots of fun. Highly Reccomended