If you are in town to visit DC, Mark & Trevor's spot will be sure to meet your expectations. Super close to downtown DC, has access to public transportation and is walkable to many different restaurants. Taqueria Habanero is a must visit. We went there twice for dinner during our 3- night stay. Mark and Trevor's communication was stellar.
Just FYI- be mindful that this unit is on the lower level of a house, and you will hear the occasional footsteps from upstairs. The neighborhood itself is beautiful and quiet.