This is an excellent choice for staying in Washington, DC. It's about a 20-minute walk to the Capitol building, and Union Station is nearby if you prefer to use public transportation, which is very reliable in this area. The Capitol Hill neighborhood itself is pretty interesting to walk through, it's mostly blocks of well-kept rowhouses, often painted in bold colors.
This place is also within easy walking distance of the H-Street Corridor, which has several decent restaurants. There is a good Ethiopian cafe and another good, more formal Ethiopian restaurant close. Further down is an excellent Burmese restaurant and a pretty good pie bakery. There is also a Whole Foods supermarket close, and a Giant supermarket relatively close if you prefer to take advantage of the good kitchen space at Kyle's place. The streetcar on H-Street is free to ride.
The place itself is in great condition, it's kept very clean and the kitchen and bathroom are in excellent working order. There is a washer and dryer in the space, which we found very useful, as we traveled with our two children, who had no problem sharing the available air mattress as we slept in the comfortable bed. The kitchen has plenty of cookware available and a dishwasher, all of which in great condition. The oven works well, we baked cookies in it and they came out evenly cooked.
Parking is free, but it is restricted in the sense that you can't keep your vehicle parked in the same spot over 24 hours. There are times where one side of the street or the other is closed to parking, mostly due to the nearby school. Perhaps they allow unrestricted parking when school is not in session. In any case, if you drove to D.C. and want to park your car in one spot and not move it while you are here, you'll want to figure out a place to keep it overnight. Kyle graciously bailed us out by finding a place for us to park nearby, something he didn't have to do, and we appreciate it.
You should definitely consider staying here if your travels take you into Washington, D.C. Thanks, Kyle and Nikki!