Pros:

Solid design throughout.
Varied locations with good detail.
Inventive events.

Cons:

Some of the single levels are a bit long.
Too many 90 degree corners.

Conclusion:

This campaign ranks among the best of the user made efforts, along with  Detour Ahead, I Hate Mountains 2, Dead B4 Dawn and Death Aboard 2.  The details and thoughtful design persist from beginning to finale.

My only issues are with the following:

Much of the map traversals consist of:  move, turn 90 degrees, repeat.
There are some areas that stray from this forumula, like the beautiful riverfront town and the arena finale, but the rest is a series of 90 degree turns.

The event with the fire and the boat can be easily glitched if a charger knocks survivors into the fallen bridge before the boat arrives.

Other than that, this is a must play - one worth going back to.