We stayed at Judy's while on a quick trip to DC and had a lovely stay.
Judy's place is as described - a very well-furnished and clean room in a beautiful locality. The place was close to the National Mall. The one minor issue (if you can call it that) was that one had to push hard at the room door to close it. The bathroom is very nice and clean as well.
There is free parking on the street perpendicular to the street the house is on (as she describes on the listing page). Judy sent us detailed directions on how to enter using the self-checking code.
Since we were there for very little time, we didn't meet Judy for a very long time, but she's very sweet and ensured that we had a comfortable stay. Definitely 5 stars and we'd definitely recommend staying at Judy's if you're in DC.