Pros:

map gets better further you go
no arrows = more adventure

Cons:

bot navs

Conclusion:

maps are sort of fun to play. kind of cliche but oh well it's free and we take all we can get.
works in both l4d and l4d2

Pros:

3 or 4 maps rolled into one.
No nav problems.
Fun
Free

Cons:

Took a min to download.

Conclusion:

Been playing this map for a few months off and on.  Tagline from old PC Gamer magazine read "If it's not fun, who cares!".    This map is fun.