Pleasant stay. Definitely a small room but clean and comfortable. The bed is a decent quality memory foam type and is comfortable as well. Gary and his family were very responsive to all communications and even loaned me a phone charger and cable!
It's about a 5 minute walk to the free DC Streetcar that takes you to Union Station with numerous stops along the way. There's also a Capital Bikeshare rack right next to the streetcar stop, which I found very convenient (18 minute ride to the National Mall). There's both a Whole Foods and a Trader Joe's within biking distance, as well as quite a few interesting restaurants.
This is an older urban neighborhood which, to me, seemed quite safe.