Well, for one, you don't have to rely on observers/watchers anymore. You also don't have to pass functions back up scopes/templates/components. It's also really

Well, for one, you don't have to rely on observers/watchers anymore. You also don't have to pass functions back up scopes/templates/components. It's also really easy to keep your code organized (since data can only go one direction, in a big circle, it's much easer to follow the flow of logic).