Pros:

No melee's. They have made game little too easy and this is great that this map doesn't have them.
A little too foggy than original, but fog looks more... Detalised? Well, thats new.
Doesn't have lightning bugs as L4D1 version (but bugs were because of foolish update of the game itself, which crashes a lot of very good campaigns).

Cons:

Very low on ammo. Well, it's l4d2, where weapons have reduced ammo supplies. I think, you need to place 4-5 ammo piles on the way. Or place a D.Eagle.
Bad navigation for bots. In L4D1 it was better.
Serious con - no versus play. Like in original. But map vitally needs it.

Conclusion:

Feels like a brand new map. Although it's an old map for L4D1. But you will not see another one like this in l4d2.

Pros:

Hey! You know what this calls for? A PARTY!

Cons:

none

Conclusion:

Fireworks for party - check!
Aaand... TWITCHY-TWITCH! It's predicting more comments from ponyhaters! Beware! O_o