I watched it last night. Loved the music for sure, and the animation was incredible at points. The scene in the beginning, where Moana is picking up shells the ocean leaves in a trail, and the water forms a wall and turtle swims past was beautiful.
As for the storyline...it was interesting that it didn't have a villain in the way that many films do. I won't expand on this point, because spoilers and if you've watched it you understand, but the way it was done was good, and also made sense. The rest of the storyline wasn't incredibly complex or anything, but it was certainly different from the Disney princess movies of the past.
Overall, it was good.