The house is very clean and the room was exactly as described. It is a private room, with lock, in a larger house with several rooms being rented. The facilities were more than enough that this was of no inconvenience at all - multiple toilets and showers. The space was extremely clean, and the facilities were very high quality (a world of difference compared to the usual budget facilities of airbnb's).
The host was very quick to reply. The agreed to a late check-out, which was crucial as I chose to climb Mt Fuji the night before I was leaving. If you wish to explore the city more after check-out then they are happy for you to store your luggage in the front hall of the building.
Location is very good. It's right by Ichigaya station, which is just a couple of stops from Shinjuku. There are two 24/7 convenience stores nearby, and a few places to eat too!
I would definitely stay here again.