I have bullhorn bars (like SteveKnight's) on my fixed gear commuter. I did it because I liked the look. I did go ahead and put regular barend/aero break levers since I didn't need shifters. I am always playing with my bikes so I may try one of these bars just for the heck of it. Will probably use the bar end brake levers unless another option jumps out at me.
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If it ain't broke, mess with it anyway!