I saw this movie last Saturday. I think it is better than "Spirited Away". The animation was top notch but the Story Telling was what really made this movie good.
The Story is about Sophie a young woman who doesn't think much of herself. She is on her way to her mother's hat shop when she is accosted by two soldiers. A wizard (later known as Howl) saves her. Howl is pursued by a jealous rival known as the Witch of the Waste. She in turn puts a curse on Sophie so that she turns into an old woman and can not tell anybody about the curse. Sophie then journey's to Howls moving castle (powered by a fire demon) and get's a job as Howl's cleaning lady.
Okay so my short synapsis doesn't sound very appealing. But trust me the movie is very good. I believe that the moving castle is a metaphor for us as human beings. There are different forces within the castle and each character living within represents different sides of us. Sophie is wisdom and Howl -ambition. Kalsaphor is ingenuity.