Pros:

It's not any Clone, it's a 501st Clone
very detailed
looks bad-ass

Cons:

No icon
No FPS arms

Conclusion:

Awesome skin, but still need to be worked for the icon and FPS arms. It's a shame, otherwise it would be an awesome skin

Pros:

-nice-looking skin
-awesome custom sounds
-good animation
-so cute /)^3^(\

Cons:

-a little too bright

Conclusion:

best Witch skin ever

Pros:

you "meet" L4D2 survivors
some scripts really well done
good continuation all along the campaign
good level design
some monuments are well done

Cons:

the final, not really exiting
Some level at the end are a little bit too... grey
nothing funny with the wheel :( (we have waited since the first one)

Conclusion:

One of the best L4D2 campaign, like a very official campaign

Pros:

-apocalyptic and desert atmosphere
-new building create for the map
-awesome swimming pool area
-electric TREEHOUSE (and create for the map)
-day/night in the same campagn

Cons:

-some bugs
-no epic final

Conclusion:

probably the best complete, original, and awesome map

Pros:

Really nice eyes
red tongue hanging \o/
it's exactly Venom
burned skin if inflamed
black arms in the FPS view in versus

Cons:

spider symbole on the chest, a little blurry
a little too "blue", the skin should be better black or violet

Conclusion:

One of the best tank skin ever

Pros:

Pretty detailed skin
Good to have a choice between the original and the sick version
icon character
FPS arms
more dark skin that the original

Cons:

should be a Ellis skin (too many good skin for Nick)
Face details a little blurry

Conclusion:

Better than the original, and really fun to play with it

Pros:

Awesome and realistic skin
character icon 
FPS arm
name change
exactly the same skin that the 2010 Freddy version 
you really think this survivor IS Freddy

Cons:

some problems with de claws when you pick some weapons

Conclusion:

Probably the best survivor skin ever

Pros:

pretty nice skin for both
they really float above the ground
the items they carry are well fixed

Cons:

not FPS view
character icons are just picture that you found on Google images
should be separeted, because they have nothing to do each other

Conclusion:

A pretty original skin, well done