This place was the perfect refuge while exploring Tokyo for a week. Relatively easy to find from the airport using google maps and the exterior pictures provided by the host. Check in was simple and easy.
The apartment is in a residential area on the second floor above some kind of very small bar/restaurant (I think?) and there seems to be a total of four units. Noise was not a problem. It is a five minute walk to Sasazuka subway station (i timed it). There is one route to the station that takes you along a grassy stream and a parallel route that has lots of restaurants and shops. Either way, the station is surrounded by restaurants and cafes. Shinjuku is three stops from Sasazuka. There are at least two other stations within walking distance which google maps led me to sometimes depending on where I was going.
The apartment is most importantly air conditioned which made it a huge comfort because it was very hot out during my stay. The room is small, the bed takes up close to half the room. Fine for myself but might feel crowded for two. There is a washing machine on the balcony and a line to hang your clothes to dry. The buttons on the machine are all in kanji but a google search helped with that. I found some detergent pods to use as well. The apartment was well stocked with soaps and toilet paper and all other necessities. Even several umbrellas hanging outside the door which I assume were for guest use.
One thing about this space that is slightly unusual is that the toilet is alone behind one door close to the entrance, but the shower is on the opposite side of the room and opens directly onto the room. There is no bathroom sink or counter area so I had all my toiletries arranged next to the kitchen sink. Again none of this was a problem for me but due to the layout, i would only consider sharing this room with someone I know intimately.
I had no problems during my stay and no need to contact the host.