Pros:

Set in Japan
Detailed environments
Great sceneries
Well bot-nav
Combined with Realism Special Infected mod,  adds more deserted atmosphere in the abandoned mine 

Cons:

Little bot bug on the tram car

Conclusion:

Well, another best I've ever played
Some heads-up, watch out for Chargers on the last map after triggering the scavenge

Pros:

Silent Hill atmosphere
Long
Custom special infected  (especially the Witch, for me)
Fogs 
Exploring
L4D1 Survivors cameo 
Storyline
HD environments

Cons:

Easy to get lost
Supply scarcity
One time, when playing first map, Coach won't pick up any supplies (given that he was unarmed since the beginning)

Conclusion:

A campaign that totally requires teamwork, and patience