Pros:

-Fits the original game perfectly layout-wise and visually, even down to the 2d graphics on certain objects.

-Has it's own custom music and sounds in places.

-Very challenging and fun, with no areas where the infected can be plowed through easily as in certain maps.

-I have yet to find any nav issues after some time playing.

-Fair to the survivors as far as supplies are concerned, and interesting as certain supplies are randomised each playthrough.

Cons:

None that I can find.

Conclusion:

Exceptionally fun and well made map, I'd love to see more from the creator - possibly even a full campaign based on Hexen, unless other maps are already being planned ;D