React now includes nodes to control Mecanim Animator components and NavMeshAgent components. You can now quickly create lifelike NPC behaviour! There are new components to support 'Chain of Command' scenarios, where you have a Leader AI, and a state system for saving variables and performing operations on them. This adds much more versatility to the behaviour tree.
React is a Behaviour Tree tool which can add intelligent behaviour to your game objects. It makes things as simple as possible for the game designer, yet remains very powerful for the game programmer.