I was in Sterling with an organization recently, and our team leader chose the Doubletree Sterling based on a number of factors including room size/setup, group rate and included breakfast (all of which were important for our group of volunteers paying their own way with some splitting rooms).
This hotel worked perfectly for our needs. The rooms for very well equipped and the beds incredibly comfortable. The two queen bed rooms were spacious enough for small meetings, and for larger meetings the 6th floor conference room for larger gatherings. The hotel is only minutes from Dulles airport. The included breakfast was a fresh, hot buffet including eggs, meats, potatoes, baked goods, fresh fruit, cereals, juices, coffee and tea. To say the staff was friendly and accommodating would be understating it. For evening gatherings, the dining room also had a full bar to relax in.
The staff and management have put together a great team and a great hotel.