Pros:

crazily exciting hordes

real joy for those who love heavy firepower

some interesting "puzzles"

innovative design (e.g. the "Half-life style lift", the unsafe saferooms)

unique (comparing with other campaigns)

Cons:

the NPCs die or get hurt eaily and stupidly whenever they have to climb up or down long ladders

some "supernatural" design (e.g. the floating blocks)

some zombies suddenly appear in the air...

Conclusion:

It's a well-deigned, unique, exciting campaign. The hordes designs are good. For those who love heavy firepower plus intense killing, it's really an enjoyable campaign. I love it.

Pros:

Scary atmosphere in the first two maps
Great fun of massacre in the finale
Nice music
Interesting idea of ghosts
Scary effects in the mansion

Cons:

Bots might get stuck on the boxes in the finale
Some ghost look stupid
The finale is really difficult

Conclusion:

A great campaign. Worth playing. Enjoyable horror moments. Interesting idea of the combination of zombies and ghosts.

Pros:

a lot of hordes.
nice route design

Cons:

1 serious bug - 
the first stage "open drainage gate" --> seems there's no way to open that.
2 minor bugs - 
stage two there are invisible cars in the middle of the story.
in the finale, when the NPCs are climbing up the long ladder, they drop dead too esaily.

Conclusion:

the serious bug spoiled the whole stage 1. apart from this problem, it's a reasonably exciting campaign.

Pros:

So far the best in map and details design
Good combination of zombies and special infected
Good design of difficulty and playability
Great experience of survival horror

Cons:

Nil

Conclusion:

So far the best campaign I have ever downloaded. Must play!