I was SO delighted to hear Disney would be moving away from CGI and back to good old classic animation, and this movie was a lovely beginning.
However, I would say that the plot does lack somewhat in a way that sets it apart from other Disney classics. The writers seem to have put most of their efforts into cramming as many characters and musical numbers into the movie as possible, and the plot suffers somewhat because of this.
Don't get me wrong, there are some brilliantly catchy in this movie, namely "Friends On The Other Side" and "When I'm Human", but there are also a good deal that seem a little forced and unnecerssary.
The same applies to the characters. For example, we are told very little about the Prince himself, aside from that he's quite a playboy, and so theres never really any connection with him. Frankly this applies to a large portion of the characters. I think the Princess and Shadow Man are the only two characters with any real depth to them.
Despite such faults, the movie is still very enjoyable, with beauty visuals, some memorable songs and emotional moments. An all-out feel good movie.