I just finished this series, and I really enjoyed it. Different from Clamp's other works, but in a good way. I liked the ghosts and the creepiness factor as well as the stuff that was just pure fantasy (the demon parade, the talking flowers). Watanuki is a great lead and doesn't really fit in to the main stereotypes (not a I-will-not-fail! hero, but not useless/cowardly either). I really liked Yuuko's VA, and the character too (an actual adult), and I really want to see the next season.

Oh, and the disembodied hand in the last episode seriously creeped me out :O