This home is beautiful and spacious. It is right across from the train tracks, but you can't hear them. We actually enjoyed watching all the trains fly by through the great picture window spanning the length of the living room.
It also has a good size walk in closet, good beds, and high-end shower and toilet. We used the washing machine, and were able to hang dry our clothes on the balcony overnight. it has three coffee makers, and a tea maker. The host, Midori, is super reachable and contacted us multiple times to make sure our stay was good.
The whole place is very high-end and clean. As a family of four, we all had enough space, including a separate bedroom for our teenager. There is a grocery store directly on the bottom floor of the building that's open til midnight (great for those arriving late!). There's also a grocery store on the corner, and two JR train stations that are walkable and central to Shinjuku station.
It's a short walk (5 min) to a neighborhood with restaurants and shops, although this isn't the most exciting part of the city. But with a Pasmo card, you can be in the most lively areas (Shibuya, Harajuku, etc) in just a few minutes.
Overall, an amazing place (huge for Tokyo standards) and way more spacious than a hotel for similar price. (Yes, the cleaning fee is high, but now we know it's because this is a pretty big two-room apartment!)
Thank you Midori!