I really like the behavior of the enemy mobs like Zombies, Creepers and Skeleton Archers.
The AI of the pecefull mobs like Pigs, Chicken AI, etc could be improved upon (when they idle they could do some more interesting things besides going into water), and their fleeing behavior works.
But this mod creates the best enemy mob mechanics I have seen so far.
The Textures in this mod add a consistent feeling while playing in your survival world. Coherent Design is nice!