For what it's worth, I love my aero bars. I mounted the Profile Design (their low end model) on my Trek Navigator. After several adjustments I now prefer riding on the aero bar almost exclusively. At first I was unsteady and would snap up to the upright riding position when a car approached. Now I feel as stable on the bars as in the traditional position and rarely ride upright. I also have picked up a slight increase in speed. To those who would try aero bars I would say - give them a decent tryout period. You might find you like them as well as I.