Pros:

Great textures
New additions to zombies
Well details
great atmosphere
love that there's actually PEOPLE in the first level
LOVE THE COW LEG
Love the mods
love that there's wide open spaces

Cons:

a few things need to be cleaned up like a few places I got stuck in but that was my stupid curiosity. other than that, NO CONS!!!!
Maybe you could just add like a custom melee weapon

Conclusion:

I LOVE THIS CAMPAIGN!!!!! BEST THING I'VE EVER F***** PLAYED IN L4D2!!!!!!! EVERYTHING ABOUT IT BRING A NEW FEEL TO LEFT 4 DEAD! DOWNLOAD THIS CAMPAIGN!!!!