Pros:

-Brings back the dark nature of the  l4d1 atmosphere
-Detailed maps, invites exploration
-Wonderful challenge balance, even on expert level
-Great combination of narrow and wide variety of areas
-Maps allow a robust amount of common and special infected to fight
-Challenging Finally, but not too overwhelming

Cons:

-If you're not use to playing on expert level, this camp will definitely chew you up and spit you out. :P

Conclusion:

What can i say but praise this piece of work for giving me and my friends such enjoyment in playing through this.
I Hate Mountains is defiantly an all round winner along with Death Aboard.

The dynamic of this campaign sparks that immersible feeling i had when i first played left 4 dead 1.

I wish camps like Tour of Terror, Suicide Blitz 2 and a few others could possess such a great challenge balance this camp brought.

If you're reading this and are new to playing custom content, download these maps! It's a great way to introduce yourself to a well created custom content, before having the more unfortunate gameplay experiences other authors may provide.

Great job on this!