Our family of 5 adults stayed in Kiki's apartment during our visit to Tokyo and we all loved our stay. The apartment is centrally located, approximately 10-15 minute walk from the main Shinjuku train station. The path cuts through the red light district and is an interesting sight at night. The Higashi-Shinjuku station is much closer, approx 7 minute walk. There are tons of restaurants and convenience stores in the surrounding area which made it easy to get food at any time of the day/night.
The apartment itself was well furnished, beds/bedding were clean and comfortable, kitchen is decently stocked (we used the kettle and microwave, but did not cook), bathroom/shower amenities were abundant. Our family favorite was the shower head and water pressure. Wi-fi in the apartment had good, consistent signal strength and a pocket wi-fi was available to take with us during the day. The apartment is nice and spacious by Tokyo standards, we were grateful to find such a great deal close to everything and a very kind host, thank you Kiki!