I stayed at Anton's DuPont Circle condo for about a week while in town for a long conference, and it was very convenient to the metro, to coffee shops, restaurants and even a massage place across the street! The condo was spacious and clean, had clean towels and basic necessities in the kitchen. I did not have time to cook, but the mugs and wine glasses came in handy.
It was spacious and comfortable and Anton was accommodating and responsive, checking in with me on the first day. There are about 8 lock boxes on the railing, but the one for the condo was well marked and easily accessible.
The neighborhood is a little loud at night, and street noises were heard clearly from the living room, but the bedroom door was heavy enough that it was fairly quiet in the room and my sleep wasn't disturbed. The bed is very firm, so it got a little getting used to on the first night, but it didn't bother me too much. Overall, it was comfortable and convenient. I'd stay at this condo again next time I visit DC!