The post focuses on the evocative backgrounds, but also mentions the characters. IMHO, the best thing about Oh Edo Rocket is the portrayal of the life in the long houses in general, and not specifically anime backgrounds or other technical components. In fact, the layout of Oh Edo Rocket is quite bold this way. Long houses are often acknowledged with reverence or sit in the background, but no anime dares to make them so much of a key ingredient. Watching Oh Edo Rocket is like visiting a bigger and even wackier Edo-Tokyo Museum.

UPDATE: Avatar e-mailed that he uses "row houses". I don't know what's more correct. I think they may be called "naga-ya", or literally "long house/shop/barn", but I am not sure.