I just got Profile Airstryke aero bars. They took a little getting used to, but now that I'm used to them, I would say I am in the aero bars for 75-85% of each ride. I don't use them in town, when I may have to brake quickly. But once I'm on the open road, they are very comfortable, and take alot of strain off my wrists and hands. If I'm in the lower drops too long, my hands tend to go numb. Using the aero bars, all the pressure is on my forearms. I don't plan on taking them off, except when I compete in a triathlon, where they are usually not allowed. You can get in big trouble with aero bars, if you're cycling fast and you're riding close to other cyclists.