Watched the last episode again and I still contend this is visually and stylistically one of the greatest episodes in anime history. I remeraber wondering why nobody else has tried doing more anime in luscious black and white. Without colour (or rather, with only a black and white palette), you can really appreciate the art and design work that goes into some of these anime productions.
I think a lot of people may misunderstand the amount of effort that went into this episode. People think, "Oh, they just draw it up and don't colour it." But there's a really subtle use of greytone here. This isn't like doing live-action black and white-- you still have to actually paint in the tones, even if it'll come out black and white when filmed.