I used Red Top yesterday and they arrived promptly, as promised, to the pickup in Falls Church.
The problem was the driver. He was one of those 20 mph in the left lane types and by the time that I got to DCA I sure had ants in the pants.
The other problem was that the vehicle was a quite uncomfortable van that increased in discomfort geometrically as the driver dawdled down Rte 50 managing to get caught at every traffic light.