I stayed at the Crowne Plaza Dulles Airport for two nights in June 2013. The hotel is close to the airport, quiet, and has good basic amenities. I am especially thankful for the customer service of Ana and Mike at the front desk. I needed to prepare some documents for work and was having trouble with the printer in the business center. They both went above and beyond to help me take care of my business, while having a very generous attitude.
The hotel also offers a shuttle service to/from Dulles airport. I would stay here again and recommend it to travelers coming through the Dulles airport area.