Very nice space in the bottom floor of a single family home (not sublevel, however). Nice quiet neighborhood which was perfect for us visiting family. If you want to see DC's sites, will need to take Metro, which is just a short walk from the property.
Host was very helpful, offering her umbrella as it was pouring when we arrived. Parking by their garage was a plus as on street parking is limited to residents with permits.
If someone has issues with steps, I would be wary. Getting to the entrance from the street involves a number of somewhat narrow steps, esp. from parking the car. Also, no real kitchen, which is shown and described. Not an issue for us.
Other than that, would highly recommend.