The Good:
The location is excellent--very close to the National Mall and many sight-seeing spots, as well as excellent restaurants and public transportation. You do not need a car here.
The apartment is clean and private.
The hosts were communicative and helpful.
The not-so-good:
1) My visitor parking permit was denied by the city, so I had to pay to park Monday (pretty sure the hosts could not do anything about this, so I went about my day without messaging them).
2) The apartment had a bit of a musty smell, like mold. When we dropped off our bags, I thought it just needed to be aired out so I didn't think twice. But when we got back later that night... I wasn't thrilled. The smell worsened as you walk back into the bedroom, so my husband and I folded out the couch to sleep in the living room.
I didn't message the hosts about it at the time because we got back from dinner very late and I was sure they were sleeping. Plus, what could they do? And it was only one night.
OVERALL:
This place was really great. Cute neighborhood, great location, peaceful spot. I wanted to give high marks across the board, but the musty smell made me uncomfortable.