Had a good time at this apartment. The pros of the place are:
1. The location is great, about 600m from the Toei Ryogoku station, about 1km from the JR Ryogoku station, and walking distance to Senso-Ji temple.
2. Edo Tokyo museum and the Sumo arena are next to the JR Ryogoku station.
2. Generally clean.
3. Lots of supermarkets and convenience stores nearby.
4. A combined washer dryer in the unit.
5. It has a nice view of the Skytree from the window.
6. Little touches that help you use the available space, like a bar above the bed to hang things from, and a folding table.
Cons:
1. No elevator in the building. Luggage can be difficult to get up to the 4th floor in the cramped stairwell.
2. Small apartment. I am not sure of the size, but possibly 12-14 square meters.