Yasuko is a lovely host. She is close by (next door) if you need her but not at all intrusive. The apartment was perfect for us, a family of four (the youngest is 15). It has a nice kitchen, a great shower and very comfy futons. I would say it is not for tall or big people or anyone who doesn't want to sleep on the floor, Japanese-style. It is just a five minute walk to a little train station on the Seibu-Tamagawa line that quickly connects to the Chuo line and then into Shinjuku Station. The neighborhood is quiet and low-key and as first-time visitors to Japan we found it a great respite from the intensity of Central Tokyo. We had a wonderful trip!