Great value for Tokyo. Clean, well stocked, lots of natural light, many kitchen appliances and roomy closet for luggage. Great train access through Uguisudani and Ueno, two 7-11s and grocery store nearby. Friendly host answered questions quickly and thoroughly.
Minor things - You may have difficulty fitting in the toilet space if you have very long legs or are over 6 feet tall. We found the bed and floor mattresses too firm, even with extra padding, but that's personal preference.