If you can code yourself then its not as useful, but you can definitely still make use of it. It's great for AI since it basically creates State Machines with actions inside of them, you can use the heaps of actions that come with it and also create your own actions to drop into the UI pretty easily. From what I understand…
I use it, really happy with it too. Very flexible tool. It lets artists that understand the game logic but can't script/code go ahead and build working gameplay. It's totally worth it. It's on sale during Unite 2012 also and likely the last sale this year so if you're thinking about getting it you may want to jump on it.