Five stars would fall short, as the host went above and beyond for us! I had recently had bad experiences with Airbnb and was losing faith, but thanks to this experience, I may still book on Airbnb, just much more selectively.
The rooms are beautiful, with tatami and futon. They seem to be custom built and have a great look and feel. Rooms were also very clean and well equipped with toiletries and essentials for cooking.
There's an AC/heating unit, and on the 4th floor, units have a small outdoor area. Washer on 3rd floor.
Bear in mind that the stairs are quite steep, so if you have reduced mobility, make sure to stay on the 1st floor. The staff at the Airbnb can help bring your luggage up or down free of charge.
One other detail the host had with us was that we asked if they had a scale to weigh our bags, and they didn't have but went to buy one and left it in front of our room to use it before we left.
Location is great, Kuramae stn a few meters away and Asakusa not far either.