Jamie and Thomas are good hosts, they always answered fast and gave us nice advice and even two passes for the Philips collection.
The place is located in a very quiet and safe residential area and is a 10 minutes walk to the metro but also relatively walkable to all main DC sights if you like to stroll.
The apartment is big: nice living room and bedroom and great kitchen with all you need to cook everything.
The only flaws were: bed, sofa and pillows needed to be thoroughly cleaned; the bathroom needs a bidet (essential for Italian people) and a nicer shower.