Pros:

- Large Maps
- Great interactions with the terrain, cool events.
- Hidden doors and easter eggs.
- Decent interaction with the maps.
- Unique finale.

Cons:

- Way too many special infected.  My friend and I had issues with sometimes there feeling like there were more specials than common infected on Advanced, when other campaigns do not have this issue.
- Third level is too advantageous for Smokers.  The entire finale area is a giant balcony just for them.  It creates more frustration than fun.
- Experienced teleporting specials, and specials that spawn in closed areas directly behind you.
- Issue starting first level in Multiplayer.

Conclusion:

Overall the campaign was pretty fun, however I experienced a lot of issues with Specials.  There's way too many in comparisons to other campaigns on the same difficulty (Advanced).  It really hurt the experience.  In Map 2, we actually ran into 6 before we got out of the bathroom area, and over 15 before the second wave of Common Infected.  Also, Smokers are far too common and there are far too many areas for them to hide out in excess.

There was also an issue with the first level loading in Multiplayer.  Players other than the host often crashed, after confirming that the versions were exactly the same.  It took us several days to get it working, just constantly attempting to change versions and run it again.  Eventually it just decided to work.