We loved staying in Keiko's home. The location, in Taito-ku, is right by the Minowa station (on the Hibiya line). This station is well equipped with elevators, and even has elevators to help you cross the streets on the raised walkways. It is about a 20 minute walk to Asakusa, where you can find the beautiful Sensoji temple (or you can take the metro if you don't feel like walking). You are 20-30 minutes by metro to Shibuya from this location. I did not find the location inconvenient at all, and enjoyed the quiet neighborhood very much.
The home is well equipped. We were amazed at the shower - it was seriously great and it was my favorite part of the home! Also, when we came to Tokyo it was HOT so having air conditioning was extremely appreciated.
Keiko was so kind to give excellent directions, and met us when we got off the metro. She sat with us and explained features of the home, and also gave us a map and told us where we could find certain things (like a pharmacy, supermarket, etc). There is plenty within walking distance and a 7-eleven very close (for visitors with no Japan bank ATM card, you can pull cash at the 7-eleven ATMs).
Keiko was also very kind to hold our luggage when we needed to leave a little late. Seriously great host and even brought us some treats which we really appreciated. You will enjoy your stay in this home, it is very private and very comfortable.
Thank you again, Keiko!