This place is great.
The location/neighborhood is excellent : within a mile to the Capitol and the Eastern Market Metro station and Trader Joes groceries (with a Capital Bikeshare rack nearby, if you don't want to walk even to those places), quiet street.
The accommodations are great : definitely plenty of space for four, clean, fully-loaded kitchen stuff for cooking/eating in instead of eating out, nice television entertainment set-up, beds are comfy, responsive Wi-Fi.
The extroverted owner is nearby and very friendly/helpful, but completely non-intrusive. She put in a lot of subtle personal touches to her rental and clearly thought through this enterprise thoroughly.
Personally, I feel lucky that I was able to book this place for a family vacation. You cannot go wrong staying here for a getaway.