Pros:

- Custom models and textures
- Custom sounds
- Excellent atmosphere
- Map layout 

Cons:

- None

Conclusion:

I loved this campaign. I can't stress enough how much the custom sound effects and music can make your map really stand out and become memorable. I like that instead of an extra tank at the end, you have an intense swarm of infected. Adds some variety for my awesome custom map collection.

Freaking great job. Keep up the quality work.

Edited: v1.1