Red Roof (and Hotels.com) bailed us out in the early AM after our pre-paid reservation at another property in Chantilly was not honored. The staff was always friendly, the room was in good shape with some renovations done, the AC was quieter than most of that sort. All in all, basic but just fine.
The only thing that was a little disappointing was that the breakfast was pretty limited. But I didn't need waffles that badly anyway.
We will likely stay here again next year when we come to help with the American Rocketry Challenge finals. The location is quite convenient to the flying site.