Great Location, close to Ryogoku station on the Oedo subway line. If you like sumo, the Kokugikan is also 5 mins away. A Lawsons convenience store across the street and a family mart 1 min walk way. Recommend the Maruetsu super market for cheap ready made food, discounts later on during the day. Shower works fine, no major problems of note. Host communicates well.
However, if you need to do a lot of working from home, maybe have a look somewhere else. No desk, a low rickety coffee table and sofa doesn't make for the most comfortable of home offices. Would recommend this place for larger groups who are going to be out and about a lot.