We had a great stay at Aoi's place. It was 15-20 minutes away by subway from Shinjuku, with two options of transport nearby. You can hear the train passing constantly, but it stops at around midnight and it didn't disturb us. The place was very clean and more spacious than I expected, we were in a group of 4 and had no trouble sharing the place. Shower was great as well as the beds. There are two kombinis and restaurants nearby, it was nice to come back to the friendly neighborhood after spending the day out. Thank you, Aoi!