Absolutely beautiful piece of animation. Parts of it didnt even really feel like the DN ive come to know (The opening parts and Misa's walk specifically) but at the same time they lended the episode a special kindof feel.
The roof and stairs scene really amazed me and since im a anime only watcher im pretty delighted to know madhouse added those bits themselves. Yes they did have abit of a yaoi feel to them, but damn if they weren't cute and gave abit more depth to L for me.
Overall just a stunning episode...absolutely. Easy 10 heh.