Pros:

+Very unique
+Orginal
+Actually scary at times, especially the noise effects and the mansion, very well done
+Nice looking
+Never found any real glitches 

Cons:

-Finale IMHO could of been better, perhaps more routes to take, and a better indication when you are about to reach the end (Minor complaint)
-Overlook on 2nd map, on the street with the 3 houses, the house on the right had a door and I shot it down, to find it was just scenery, not part of the level, ruined the atmosphere a little (minor complaint)
-Missing texture of the fireplace in the 2nd level (minor complaint)

Conclusion:

Overall, I really enjoyed this map. It was fun, orginal, actually scary, and fits L4D very well. Thank you :)