Pros:

Fantastic original maps, gets away from the standard buildings etc.  Difficult to figure out, however, the clues are there if you have a sharp eye.  The dangerous jumps have to be precise, or you got to start over.  Got to use game instructor to better understand what to do.

Cons:

Very difficult in normal - can't imagine playing in advanced, trying to navigate dangerous terrain while hoards and special infected are attacking.  Should probably hold back the attacks while having to make the dangerous, precise jumps.  The informative clues that pop up should stay up a little longer, as it's hard to read when you are fighting at the same time.

Conclusion:

A very original, very challenging campaign, not designed for beginners, rather for experienced players.  Can't wait to see more maps from the designer of this, as there are unique aspects which will make you want to play this again and again.