I stayed for about 7 weeks at Hoderic and Marina's place. Overall, I really enjoyed my stay - I didn't want to leave! The location of course cannot be beat: ~5 blocks from the White House, super close to the mall, museums, etc. I also felt safe walking around there at night, as there is a large police presence around all of the surrounding federal buildings.
The building and the apartment itself are very nice. The apartment was well furnished and well lit enough even though it faces the alley (I thought it was actually a great amount of light for an alley-facing apartment). Having the little porch was really nice as well! Fun fact: from the porch, you have a view of the back of Ford's Theatre. The noise in the alley is definitely loud at about 7:30 am on weekdays, but not any louder than you would expect street noise to be living in the downtown area of a large city. The bed and the couch were really comfortable. Fully stocked kitchen with all the essentials I needed.
I worked from this apartment every weekday and had no major issues with the wifi. For a couple of days I had my sister with me also working from there and the wifi handled that fine too. There was one small maintenance issue with the sink which was repaired immediately from the maintenance crew in the building. The front desk staff were also really kind and helpful throughout my stay. Hoderic and Marina were easily reachable by phone or message and kindly checked in on me every so often. Overall, it was a great experience!