The apartment is small yet cozy. It is neat and tidy. The place is located two stations away from Shinjuku, relatively more convenient than other places at similar prices. You'll have to walk about 8-10 minutes to the nearest station. There are convenience stores and a 100Yen store nearby. The host is nice and we got detailed guidelines and directions regarding the location and transportation of the place. The check-in procedure was easy. There is an elevator.
On the other hand, the room is not soundproof enough to hear outside and neighbours though. We did not sleep well and were easily awaken from sleep. Also, the room could not fit in both luggages so it was pretty inconvenient when we were getting things from them or trying to pack things up. Sometimes we would need to step over the luggages to go from the bed to the washroom or leave the house.