Pros:

-more blood 
-better gun shot marks ( to zombies and the survivers of course) 

Cons:

-it dosn't do that with the more power full weapons and mele

Conclusion:

GREAT MOD HIGHLY RECOMENED just update this mod so when you shot a zombie with say a m16 im not only seeing blood on the foor or walls make it to where its better looking and same with the meles