Wow.
I have seen 21 of the 25 episodes of Durarara!!
I don't know what to say about this anime. It's art is wonderful, and on an unrelated note, I watch it every Friday after I get home. It'll be a shame to see it go, but there's always the manga.
It's plot is enjoyable; in between the line of slice-of-life and fantasy, with stories for each of the characters. I've found myself in love with Mikado, Anri, and Kida, especially in pairings. But that's another story.
I especially like not only the first two theme songs, but the endings as well.
This anime is definitely a perfect 10.