I have had very mixed experiences with Hampton Inns--some were horrible (New Orleans, some years ago) and some amazingly nice. Even the acceptable properties, in my past experience, had hard and uncomfortable beds and relatively poor-quality furnishings.
I was dismayed when I learned that my recent business travel had been booked at the Hampton Inn Dulles-Town Center, but it turned out that this property was one of the very best! Throughout my stay, I felt that I was in a much higher class of hotel: high-quality bedding, exceptional service, nice breakfast, great shower, functioning high-speed internet, large room, and more. Everything was clean and exceptionally comfortable. The airport shuttle worked well and the location was perfect for my suburban D.C. business meetings (although the hotel itself was a bit difficult to find--don't trust the Mapquest directions to this site!).
The price was average for the D.C. area, but the quality made this a great value. I'd stay here again, even if in the area for purely recreational pursuits.