I am very pleased with the hosts and accommodating me. I flew into Narita around 5pm, and did not get to the AirBnb until after 10pm, but their reception kept open communication and waited for me past their normal business hours to get me situated once I arrived.
The spot itself was perfect for me as a solo traveler. It met my basic needs and I had a comfortable sleep every single day. There’s both a 7-eleven and Family mart just outside on the Main Street for a quick bite to eat or toiletries. The entrance to the fukutoshin line is also right when you get to the Main Street.
Something to note is that there is a communal microwave and washer/dryer in the basement floor. If you plan to wash your clothes, there’s a complimentary detergent pack at reception. It depends more on length of stay, but I would probably aim to wash 3 days worth of clothes at a time because the dryer is relatively weak.
I would consider coming back again solo. It does feel cramped, but gets the job done.