We found Risako's place to be just as described. Great location one block from the train station and very close to the action in Shimo-Kitazawa. Functional kitchen which we only really used for boiling water. Shower had almost too much water pressure :). The AC was helpful on the warm nights. We didn't spend much time indoors during the day but the living space was sufficient and larger than some of the Tokyo hotel rooms we have stayed in. Risako was quick to respond to our inquiry and follow up with us throughout the trip.
If anything was wrong with the place, it was us - having just arrived from the US, we were jet lagged, and it was hard to avoid disturbing the neighbors when we woke up early in the morning (made much more difficult since we were traveling with my 3 year old daughter). This was really only a problem the first night (as far as we know), but we felt bad about disturbing the wa of the apartment complex. So this is something you might keep in mind before booking any AirBnB - whether your stay might impact the surrounding community.