My wife and I spend a week touring DC while staying at Jim and Kat's place. Although called a 'basement' apartment, it's really a ground floor apartment, with lots of windows for light and ventilation. We loved the 'rain shower' in the bathroom, and while we didn't actually use the jacuzzi tub, did admire it for its large size. The bed was very comfortable, the kitchen more than enough to suit our needs, and we particularly appreciated the washer/dryer in the unit.
The apartment is well-situated, just a short walk from the Supreme Court, and just a bit further on to the Capitol. There are several restaurants nearby, and a corner grocery store just a couple of blocks away (and a larger one just a couple of more blocks away).
Jim and Kat were very friendly and very helpful. They met us when we arrived and helped us settle in, including some fascinating conversation. Jim went out of his way to help me with a couple of requests. All in all a pleasant experience. We would definitely stay here again.