I stayed with my family in the basement unit for two nights. Great hosts - it is pretty apparent that they have thought about everything to make the room comfortable for guests!
They asked how many beds we would need and had them ready when we reached - which was very convenient as we reached late at night. Parking is available right outside the house which is great for a city. The entry is separate and has a keypad so no need of coordinating the check in and check out times - again great for us as we left early morning. The room was very cute, had all the necessities and was very clean and comfortable. The house is pretty close to metro station - we parked at the metro station - they had metro cards in the room which is again very considerate! We met Mike in the morning and he was very helpful with suggestions about places to see in DC.
All in all, great home and wonderful hosts - will definitely stay again.