Comfortable and Stylish
We spent a very pleasant four days at the Dupont circle a few weeks ago. Professional, friendly and helpful staff, slick and stylish decor and a good bar (didn't try the restaurant). No real complaints to be honest. 
Its a very good location, being near to the metro and in a spot replete with shops and restaurants. Much more attractive than downtown.
A small thing, but I rather liked the dedicated boarding card printer. I'd not encountred one before. Sometimes one finds that computers/printers in a business center are full and you end up waiting around, but not here!