Was at a race the other day and didn't see any of these. Wondered why? There were many places on the coarse I felt it wasn't any slower to ride on the tops and kind of would have liked brakes up there. It was my first race though, and I did not have my bars setup properly for that type of riding. I had placed the hoods lower like my roadbike and well, I can see why they need to come up Maybe if I get the hoods in the proper place I won't have any desire for top mount brakes also?
Do they work well, and are they a pain to set up?