Pros:

*Bots play like bots should!
*Not over-powered
*Works properly in multi-player
*Works on custom maps
*Friendly fire from bots is a thing of the past
*Bots save their health kits for you unless use is absolutely necessary
*Bots use melee weapons - EFFECTIVELY 
*Quick reaction to special infected
*Tank priority targeting
*Bots continue should you die and will set freeing you from the closet the top priority, even over their own health

Cons:

*They do not seem to prefer melee's with longer reach 
*Bot navigation is improved but not perfect on custom maps
*Makes playing as Infected in Vs. difficult

Conclusion:

I loved it!
Absolutely a must have download!

There is not much room for improvement, grats and thank you!