The house is situated not far from the center of Washington, which is a great plus. Around 20 minutes walk via Pennsylvania Avenue Southeast from Library of Congress.
We stayed for 2 nights.
Ethel greeted us and told us where to find our bedroom and the bathroom. She apologized for not being able to make a breakfast next morning, but we didn't really need it, so it was ok.
The next evening when we returned Ethel was nowhere to be found. We were departing early the next morning, therefore we didn't get a chance to ask Ethel about the breakfast or warn her about our early departure.
Overall our stay was satisfactory.