The room is perfect. I would like to highly recommend the location - kagurazaka （“神樂坂”）where the flat is located. It's a perfect place full of good restaurants and shops to visit. My mom and I like the area very much. It's around 5-10 minutes' walk to the subway.
For the room, it's clean and got almost everything you need during your stay. The check in/out process is easy. For group visiting, I would suggest maximum four people. Otherwise it would be too crowded. They got two bedrooms / one living room / one dining room.
One suggestion - I have my mom and I stayed, and we're given one room with two beds. However, we need two separate rooms while it's inconvenient for the host to change the setting after we settled. Suggest the host ask guests whether they need two separate rooms before their guest arrive.
Recommend !!