Pros:

- An awesome port of L4D2
- A variety of SI skinned (l4d/l4d2 hunter, smoker and tank skin)
-the L4D2 athmosphere with L4D survivor, what else ?

Cons:

- Wait for the complete release of L4d2 maps :'/

Conclusion:

L4d has few official campaign compared to L4d2 (a "lack of technology" for Valves software). 
Your fanteam and his project show a lot of possibilities and hope for L4D.
Valve, take a look at this and promotes these maps !!!