I recently started taking the 553 to the West Falls Church metro station for my daily commute from Reston to DC instead of driving to the Vienna metro station. Not only does it save me $ 5 a day I found that it is more enjoyable to sit on the bus and read than drive through traffic and parking and all. The bus is always on time and never too crowded. It is also faster than driving. Now if I could just have a bench at my bus stop. :)