First thing to know (and I wish I read the other reviews better before booking): even though this apartment is not directly on the busy street, because of the back alley it's on, it gets a lot of noise on weekend nights from the bars on 18th street. And this until very late at night/early morning. This place is great if you're young and plan to go out and party on Adams Morgan... but not if you are a family who plans to visit during the day an sleep at night.
As for the apartment itself, it's ok. The pictures seem to have been inverted with their other listing (Kalorama Suite). The bed is not the most comfortable and it comes with a thin plush blanket, not a comforter. For the sofa bed, we found a "ball" of linens in the closet so we supposed they were clean and used them... Overall, it's not the most cosy sleeping situation...
One of the things that appealed to us on the pictures was the patio... but it's surrounded by all the back of the restaurants, loud ventilation and greasy smells... Not as relaxing as what it looks on the pictures.
Overall, not my best airbnb experience but I could have avoided it if I read the reviews a little more thoroughly...
It's still a great spot for young people who want to experience Washington's nightlife.
PARKING ADVICE: We booked parking from Colonial Parking before going there. The price was reasonable ($20 something for overnight) and the location was perfect (right across the street from the apartment).