This series has not disappointed me simply because it stays relatively within the confines of a slice of life comedy with supernatural elements thrown in. I love the character designs and Kuu-chan is darling (but still slightly sexy).
(Being male I could not really say Kuu-kun is great however to be fair he does have the same seyuu as Alto in Macross Frontier
I'm up to episode 5 and the fun is just getting started. For those of you who loved Inu Yasha this series may interest you. It even has kind of a Rumiko Takahashi romantic comedy type of feeling (but with spirit's instead of aliens).