I was recommended this hotel by co-workers who had stayed in the area for on-site visits, and was pleased with the hotel overall. The location is somewhat problematic, such that taxi drivers and such have a hard time finding the hotel. It's location near Dulles Intl. Airport makes the hotel a good "airport hotel" for business trips and layovers though, which is why my co-workers recommends it. Improved shuttle service would be helpful though.
However, once you get to the hotel, the experience is very positive. The hotel is new, clean, and run very efficiently. I like the self-service laundry, and pantry that lets you buy supplies rather than walking over to nearby gas station. The hotel room itself was large, the bed comfortable and the bathroom nice and usable. I also liked the pool and fitness center as well, which was great for on-the-go business folks.
Internet Service is somewhat flaky though. The connection is very easy and convenient, and I can use both my laptop and iPhone with it (great), but the connection can hang over longer periods. This means I have to disconnect and reconnect after several hours. Inconvenient, but the speed and accessibility are helpful.
The restaurant downstairs had good service, and reasonable prices. I had a good dinner and breakfast there, and enjoyed both more than the nearby restaurants. Would recommend the restaurant again.
I wouldn't recommend the hotel for vacations, due to location, but for business trips in the Virginia area, I thought this hotel was ideally suited and one of the better Hilton Hotels I've encountered. The price reflects the fact the hotel is clean, functional and great for business use. Will definitely use it again.