The room is correct and clean. If you don't have a car to go to Washington avoid the taxi called by the hotel (expensive) just get back to the airport with shuttle and take the bus to wiehle-reston.
Much lower than you'd expect from a hotel with the Hyatt name on it. Make sure to get a room that already has the A/C working, 'cause they say it takes about 30 min to "get going".