I also saw Howl's Moving Castle a few weeks ago and I liked it. I hesitate to recommend it unless you're a fan of animation. Miyazaki's movies of late have been pretty esoteric and altogether trippy.

Although I thought Howl's was relatively less 'out there' than Spirited Away or Princess Mononoke. My favorite Miyazaki films are Kiki's Delivery Service and My Neighbor Totoro which are more rooted in a traditional storytelling arc.

Still, I think Howl's themes and symbolism will reap many an interpretation and deep thought for years to come, which is part of what makes him such a riveting figure in contemporary animation. Plus, it's frickin beautiful to watch.