Pros:

- Japanese campaign with a lot of their culture.
- Customs textures everywhere and in all maps, i'm amazed.
- Incredible level of detail on all maps.
- Good environment variety.
- All maps are very well designed.
- Color correction in map 3 is awesome.
- Good and fluent gameplay through the maps.
- Some nice and innovative ideas like the ambulance safe room and the chair lift travel.
- Big maps with a lot of ways to go and explore.
- Relative good placement of the supplies.
- Use the L4D1 survivors, thanks a lot we need more maps with them.
- L4D1 horde music and intro.
- All maps with a dark and atmospheric feel.
- Good use of dialogue.
- Nice crescendo events.
- Finale is really cool and interesting.

Cons:

- Some missing music, safe room, ambient music (Rabies, glimpse, etc). I'm still hoping to some Japanese  music for this campaing.
-You get lost sometimes because the big size of the maps, but not so bad since you could explore more places.
- You can't grab the golf club on the start.
- Infected get stuck on the start of the last map,.
- The sniper are given to the players to soon i think, the map 1 should have only tier 1 weapons.
- Needs some performance improvements.
- Summer zombies don't fit the campaing well, it's not your fault on this, but you could maybe use some of the Passing common infected, or maybe include that new mod who brings back the L4D1 common infected.

Conclusion:

(Updated review) What i can say? I'm an amazed, i never see a custom campaign with high level of detail like this one, custom textures on every place, and a dark atmosphere, Japan feel and an incredible campaign, this campaing right now is the best custom campaing so far for me, really awesome.