I frequently work in the Herndon area and have for years stayed at either the Dulles Hilton or the Dulles Hyatt. I recently stayed (3 nights / 2 visits) at the Sterling Hyatt House, and, based on my very pleasant experience, plan to stay here instead of my two old stalwarts.
The two rooms I stayed in at the Hyatt House, one a one bedroom the other a studio, were clean, comfortable, and well furnished. All appliances worked and were in good repair. The china, utensils, and glassware were in good condition and of good quality. Internet access was included and was fast and reliable. TV channel selection was terrific.
The staff was friendly and helpful. The included breakfast buffet, with made to order omelets was adequate, and, while not on par with the Embassy Suites, it is way better than what is offered at many other locations such as the Homewood Suites, or a Hampton Inn.