Me and a friend stayed at Choco's appartment for about a week.
The instructions on how to get there were very clear and easy to follow. This has been a major pain before with air bnb in japan so it was very good.
We were greeted by his housekeeper who is such a nice lady. She had printed off a bunch off info for an upcoming festival and gave us heatpacks that we can stick on our clothes as it was only about 4 degrees during the week. She also gave us some cake from her friends shop which was really good! The house was extremely clean so she's doing a great job.
The location is also very good. From memory just 2 stops to shinjuku where we spent a lot of time. Its only a small place but so is everything in tokyo especially for this price and it is clear in the pictures.
The internet was great and invaluable. Air conditioning was also great.
The only down side was the matress to sleep on the floor was a bit thin for me, im 90kg and have issues with my hips so i need a bit more support. My friend said it was fine for him though so it's probably just because of my size and joint issues.
Choco also allowed us to stay a couple hours longer in very late notice as pur flight was leaving at night which was much appreciated. On departure, the housekeeper also gave us some more cake for upcoming valentines day!
Overall, great location, good value, fantastic hospitality!