Pros:

Challenging 
Fun to play with Friends
All Custom Things
l4d 1 Survivors
No more trolling when we have to retreat
Events
That moment when you beat the map and you here the victory music(no points added)
Ability to turn off music
Weapons
Replay value

Cons:

Bots still can't get up the stairs
lag in the final rush
not enough bow and sword weapons for all four(No points taken)
FIX L4D 1 !!!!!!!!!!!!!!!!!!!!!!!!!!

Conclusion:

This map is really good, beautiful, and you can replay it over and over without getting bored. The only thing I think you should work on is finding a modder to make you a set of characters for the map so it actually fits the story.