The sequel may not reach the heights of the original but it's big-hearted, enjoyable and visually beautiful. It should please Frozen fans and sustain the franchise. It knows what made the original great and builds on them: the relationship between the two sisters at its heart, and the ensemble of Ana's friends. I also loved the animated scenes of things like ice and water that play out almost like dreams. It doesn't have as strong a story, such as having an obvious twist, and Olaf can make things too jokey at times. But it gets the key things right, and has some pleasing music. Grade: B+