Pros:

-nice, dark setting.
-very interesting map layout.
-nice traps.
-well placed props and rooms.
-fun.

Cons:

-a few spawn glitches that may trigger endless hordes.
-broken pre-finale area.
-very overwhelming crescendos in the holdout before.

Conclusion:

I loved this campaign. One of the best maps ive played. I actually really liked the lack of extra detail, it gave the place a very dark and empty feeling to me. I still play this map, and i have been since it came out. You should touch it up and remake it, maybe even for l4d2!