Pros:

-Bright flashy colors everywhere
-Map is similar to a shooting gallery.  You can practice your aim.
-Very linear meaning you won't get lost making it great for more casual players

Cons:

-Long tedious corridors everywhere making the campaign get very old very fast
-Constant hordes without any sign of breathing room
-Item spawns could be placed better or be scattered throughout the map a bit more
-Second map lighting is excessively bright and I honestly couldn't tell if I was missing a texture or if it was part of the map due to the bright pink / purple lighting.  Regardless of this fact it's obnoxious to look at.  As a bonus the zombies are bright and flashy as well.

Conclusion:

If I wanted endless waves of enemies in an uninspired atmosphere I would have just played a survival map.