Pros:

This campaign was astoundingly well made.

Very creative, very original.

Good difficulty balance throughout.

Panic events were well planned, I also like the trick pictures that sound the alarms.

Loved the puzzles. Very well thought out.

For a campaign that predominantly used one texture over and over again, every area felt unique and different somehow. Very well done.

I could go on and on.

Cons:

While not really a con, I felt was that it was extremely difficult when playing alone and not much easier with one other person, bot AI mostly contributing to that factor. Recommended to play with a team of at least 2-3 skilled players.

Conclusion:

Fantastic campaign. Very well thought out with an equal balance of intriguing  puzzles and adrenaline inducing panic events. Equal difficulty rate throughout even for skilled players, which is a good thing. A must play. 10/10.