The apartment was nice and spacious. It is large enough to be comfortable for four guests. Especially the large windows with a view on the neighborhood are very rare in Tokyo and we enjoyed the atmosphere. Downside: it is very hot when the sun shines and cools down drastically due to a lack of insolation when overcast or at night.
Unfortunately, furniture and equipment in the apartment are very old and not always clean. So a thorough makeover would be recommended.