Pros:

-Nice level design
-realistic post-apocalyptic  levels 
-mainly scavenge for supplies
-good AI navigation
-bots are fine 
-custom stuff
-good panic events
-perfect lenght 
-looks just like one of those official campaings

Cons:

-too many tanks( 2/3 on chapter 2 and chapter 3)
-special infected spawn too close to survivors

Conclusion:

We played this campaign on expert and we couldn't beat but we will eventually. Level design is perfect for me.I like the idea of searching buildings near the road, rather than find supplies on the road. Special infected may spawn too close to survivors , I have witnessed spawning of tank,hunter,witch right in front my face. I don't recommend playing this on expert because it's very challenging.Why? Because in panic events is horde + tank at the same time and eventually you will find 1 or 2( if you're lucky) tank per chapter which makes it hard. It's good campaign and really fun if you play on Advanced or lower difficulties.