Perfect location! This was exactly what we were looking for in our stay near Dupont Circle. It's mostly a quiet neighborhood street, with a couple restaurants and other businesses just around the corner. Walk maybe 6 blocks to the Dupont Circle metro station, or the Safeway and restaurants on 17th Street, or to Adams Morgan, all surrounded by beautiful townhomes and well-tended front gardens.
The space itself is a downstairs apartment, so be prepared for some foot steps from above. Kitchen had everything we needed, including plates, glasses, a full sized fridge, sink and dishwasher. We did not cook but there was a range and microwave, and various supplies and utensils. The washer and dryer was a nice surprise, and the washer even played us a tune when it was finished!
The two bedrooms were in the back, separated by the bathroom, so there was no noise between the rooms or from the living room. The queen mattress was okay, I'm told the full mattress was better. Bedrooms were clean and had decent closets, as well as desk space in both. Clean sheets and plenty of towels were provided.
The front door opened into a rather large living room, which was separated from the kitchen by a small bar with two stools. From the kitchen, there was a door to the laundry room, which then had a door to the back alley. This was really useful in bringing in our stuff, and then packing up when we left, since we were traveling by car. You might consider dropping off one member of your party to go in the front door, and then flag your car down in the alley so you don't get too lost. Please note there was no parking at the apartment - we reserved a spot elsewhere.
Bottom line: if you are looking for a place to lay your head while exploring the coolest part of DC, with easy access to everything else via Metro, this is the place for you.