I really like it, but it feels a little rushed to me. Probably because they're trying to fit some 8-10 hours of story (from what I've heard) into 4 hours of anime. But yeah, the backgrounds look great, the music is awesome, and the story is wonderful.
And Yukito is one of the best characters in recent anime, period. I love how he acts like a normal person (imagine that!). Plus, even though he's surrounded by girls, he doesn't view them all as potential love interests, which is awesome.