We have stayed at several hotels in the Dulles area for decades (even when flying from the other two airports - yes, even BWI). We noticed this hotel when driving by several times and finally decided to try it. Needless to say, we have been back several times.
For those who know Hampton, this one represents one of the best in that Hilton category. Everything was as expected or better. The suite is roomy. One nice feature is that part of the window opens enough to be useful. Coffee is always available. The breakfast was very nice.