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.

Pros:

-custom props
-custom sounds
-silent hill chaotic experience
-challenge 
-fun
-multiple endings
-lost of maps 

Cons:

-missing textures
-lesser AI  bots problems
-read conclusion
-Nav issues (sometimes hordes didnt spawn )

Conclusion:

I'm writing this review as silent hill fan. This is something like conversion  in Silent Hill 1, so where are supplies in Silent hill 1 there will be supplies in this campaign.And we know sometimes conversions like this don't work. Played this with my team at expert, we needed   7 hours and 30 minutes to beat campaign and we killed around 8000 zombies,there are lots of tank, sometimes 3 tanks per level.Real challenge on expert. In the essence this is endurance campaign, what am I trying to say is that your skill will be tested, how many hordes and tanks can you survive on minimal supplies, and trust me you will be really happy if you see safe room doors. If your team wants a real challenge or you're just Silent hill fan I recommend it.