Pros:

- Very detailed in most areas and your time on this was well spent.
- Worth playing everyday.
- Sort of reminds me of those good ol' days of playing long campaigns.

Cons:

- Some areas felt abandoned, as in, some of them weren't even worth exploring cuz they were empty; no zombies or items around those empty areas.
- Finale had constant hordes. I didn't think I could ever finish it on Expert.

Conclusion:

This is one of my favorite campaigns. Almost feels like a campaign that Valve would make. My only suggestion is to go easy on the finale. On expert, it almost feels unbeatable. Also, I just wish that you added more interesting things to those empty areas like something "eye-catching" to players. Overall, 9/10 for a very fun and challenging campaign.