I found riding on the horns (similar to hoods) is much easier, but lever placement is definately an issue. I went through a bar end lever, an aero lever and finally a cross-style top lever before I got something that worked and was comfortable. Aero levers are particularly difficult to set up, because the cable wants to 'up' from the lever, but with bullhorns it needs to go 'down'. Nokon cables or a noodle might solve this, or just running the cable out in front of the bars instead of under the tape.