I am a PhD student and I needed to visit DC for research in the library of Congress. This location was ideal. Personally I walked to the James Madison building right beside the Capitol every day which took about 25mins, but if that would not suit you the metro is literally about 5 mins away. Kenneth lives in a lovely home right on the edge of the Navy Yard area of DC which is very new and full of massive apartment complexes. The area is nice but is a bit soulless so I would definitley recommend getting on the metro to explore more of DC during your stay. The good thing about the navy yard though is that there is a large grocery store, you're right by the beautiful dc waterfront, and the baseball/soccer stadiums are located there.
As for Kenneth's place, it had everything I possibly could have needed and was ideal for a long stay. Wifi was great, I had loads of room for food, the kitchen was great for cooking. I could wash and dry my clothes no problem, bathroom was great etc etc. Anything you could need or think of was basically taken care of!
Ken was also the perfect host in my opinion. Very respectful of privacy but also always willing to have a nice chat. He gave me loads of tips about the area and the city and was always more than helpful. Ken even took me on a tour of DC which was a highlight of my trip! I've left DC having made a real friend in Ken and I'm sure I'll be back staying at his again in the future. Ken is a true gentleman and I would absolutley recommend his place to anyone and in particular people like me who need a place for a long stay.