Pros:

-unique style
-full campaigns
-colorful
-l4d1
-Bots NAV are fine most of the time
-nice maze, not too long or not too shot
-challenging for single player
-hints on the wall
-hidden doors
-many zombies

Cons:

-maps mostly are straight and narrow. it would be nice if you can make some large area like in map 3 the alarm scene and map 4.(maybe extra map?) 
- some words on the wall are hard to read. After awhile I gave up reading them because there are too much to read and they all look like the same. Change a little bit of the side and color will be nice
-Bots NAV are pain in the ass in some area. I think it's in map4 the large square area with a bridge in the center and a tunnel. Once I pass the tunnel and going up, the bots just stay under the corner of the hill.
And in the end final, before the door open. The bots just teleport themselves through the door while I am waiting it to open.
-On map 3 the alarm scene, I actually can jump over the fence to the other hill without crossing the line at the bottom. But with the bots and tank, the alarm will still goes on anyway.
-End of map 4, where the zombies jump out from the hidden wall on the right side. I actually can see the hidden wall before it move.And I can target it before the wall open. It would be nice if I can't see it until I get there.

Conclusion:

Overall the campaign is pretty nice and I enjoy it a lot. Just some cons and of course the bots.
Thanks for you hard work~

Pros:

-Stargate
-Nice graphic
-Things are realistic
-Surprise and cool
-Not just simple straight line killing zombies
-Challenging
-Nice concept:
    gas mask
    fire extinguisher
    explosion
    tanks

Cons:

-The gate is kinda laggy when opening
-Known issue: has to wait for the bots sometimes, specially in Map4 when changing to other place
-Feel like there are some area that could be fill in more stuffs and be more detail
-The voice kinda too low to hear, have to depend on the words
-seems like map instruction in first area in map 4 kinda too many words
-Need a little more hint to find the button in map 4 

Conclusion:

My friend and I do enjoy playing your map. A lot of cool things and interaction. The lava map have to think awhile how to get across it.The voice actually work without the console.
For suggestion, I do think the length of the map can be a little longer.
 I can see you put a lot of time in it
Thanks