Pros:

None

Cons:

- Bad layout of rooms;
- No atmosphere,
- I quit after the second map. 

Conclusion:

I wanted to give a five, but i gave a six because i don't want to be too negative. Anyway, keep trying. 

Pros:

Great level design;
Good flow;
Want more like this!

Cons:

Not much dialogue

Conclusion:

I played it on advanced with bots, but i went to normal because i had loads of trouble to get through the 2nd level (first panic event is hard). Even on normal i had some trouble. Not that it needs to be fixed, but i think that playing with friends is allot better than playing with bots.
I had no lag at all.You have plenty of FPS left to put more detail in the level (more lights, particles, detail, sound, music, etc). 
The layout of the weapons locations is good (i do remember that there was one location too many actually at the second map i believe). The second map is big, not that this is a real problem, but otherwise you had 5 maps in this campaign instead of 4.  
Overall, it's the best map i played for a while. No bugs at all, except that the radio at the finale wasn't working (no sound). It's a map what you want to play in versus because the SI has an advantage in this maps.
The goal is easy, go from A to B and try to survive. You get great set pieces during the run!
You only need to polish the levels a bit futher to get excellent, nevertheless, i think you can do it!  

Btw, i expected the trains allot sooner (now you know what i like).