Pros:

Perfect size
Lots of supplies
lots of hiding/camping
l4d1 and l4d2 survivors
details
Not to easy and not to hard

Cons:

auto spit came and killed me when i was still in map :(
I think i was still in map, got abit lost, becouse the tank was chasing me :P

Conclusion:

Perfect!
Download this :D
The only thing you have to work on is the auto spit..
If that was fixed id give it 100 :)