Very nice hotel with good deal ($150 a night for 2 nights on promotion). They even had a room ready when I got in at 11am. Good sized room, clean and comfortable bed. Got champagne and chocolate as a welcome. Staff is courteous and helpful. Good location with cabs outside and a 3 minute walk to metro. Nice gym and free wifi. To top it off, happy hour in the lobby daily. Of course if you have $300 to spend, you may pick a different hotel but for this price range, you can't really beat it.
Personally I picked the Dupont circle location because of some research indicating there are much to do in the area. After this visit, I'll stay a little closer to the key sites (im talking about instead of 10min metro ride, 5min) so may try the Donovan House (also a Kimpton).