I've used them in the past but have only put them back on my bike once in the past two years. I originally bought them as I was training up for my first century and found that on that century, I rode on the aero bars about 70% of the time...they were the most comfortable, long distance position I could find. The course was mostly flat and straight. I found my set on CL locally and paid about $50 for the clip-on AirStrykes (?). My only complaint is that they rattle a lot when you're not on 'em.