Ben's place was great for our 7-day trip. My wife and I were traveling for the first time with our infant daughter, and Ben went out of his way to accommodate us.
The location was pretty good - not directly downtown, but about 6 blocks from Union Station with access to the Red Line train. 1.5 blocks away is H Street which has a Whole Foods and many bustling restaurants and coffee shops. Many nights we didn't have to travel far for some delicious food options.
The place was very clean and everything in the house was extremely nice! I will say we have previously lived off a busy street, but if you are not used to being in the city - the place could seem a little noisy. Overall, I would highly recommend this place and would stay again if we are ever back in DC.