This is a great place to stay on a budget-friendly trip to DC. The DC streetcar comes (practically) to the front door for free. The streetcar takes about 25 minutes to get to Union Station, then the DC Circulator bus will take you practically anywhere else for just $1. It takes a little longer to get around than if we'd stayed somewhere more central, but it was very simple... and way less expensive than a downtown hotel!
The neighborhood didn't feel unsafe to me. It seems to be a working-class neighborhood with a high school across the street. There's plenty of foot traffic, bikes, moms with strollers, teens with bookbags, etc, and we felt comfortable riding home with our two teens at 11pm after the Monuments by Moonlight bus tour.
The free parking was a breeze, and we didn't use our car for our entire stay. I loved that!