This is a great location. Easy access to Union Station (less than 10 minute walk) but if you don't mind walking you can get to the National Mall on foot. I felt safe walking in the area. The apartment was clean and comfortable. It would be pretty tight if you opened up the couch for another bed but was just fine for two people.
Sarah was very quick to respond to any messages. Only downside- the apartment wasn't ready until an hour after scheduled check in which meant I had to adjust my plans. Also, we realized there was only 1 washcloth and 2 towels but Sarah was quick to respond. Her boyfriend left extras in a bag on the door which I appreciated so we still had a sense of privacy when out of the room. This is beyond her control but good to know- it is a centrally heated building so you can't adjust the temperature. It was very hot! There is an AC window unit but it is directly by the head of the bed. You can crack a window.