The place is small but cosy.. Suitable for 2 people. Sufficient household equipments such as kettle, hair dryer.
Housekeeper Aiko is very friendly and suggested some places for us to visit.
However, the speed of wifi was a bit slow, even for just chatting apps.
As we went during summer, the loft is quite hot and the air conditioner cannot really cool the loft part, but there's a small fan to improve the ventilation.
The area is good, short walk to reach Koenji station (JR line).
I will definitely choose back the same place if I go back to Tokyo again!