We recently stayed for four nights and had a very nice experience. The hotel is clean and nicely decorated. The staff was always extremely helpful and friendly. The room was very clean however the sofa bed had not been changed from the previous guests. Once we reported this to the front desk, the manager was determined to make it up to us. This hotel offers an indoor pool with a nice sitting area outside, a better-than-average breakfast, and shuttle service to and from the metro station. The general area is very nice and we felt very safe. We would definitely stay there again.
One word of caution which has nothing to do with the hotel. If you visit the nearby Manassas battle ground, be aware of hitchhiking ticks.