Originally Posted by genericbikedude
in my humble (probably minority) opinion, those things suck as a primary brake on a fixed gear. when going fast, you are probably not on the flats. when you are on the flats, you aren't going fast enough to need the brake. go for a set of road levers. if you take it to the track, just swap the bars and pull the brake.
you make a good point, but on the other hand, biking in an urban environment might call for both the more upright posture of hands-on-flats as well as the need for quick access to a brake lever. so it could go either way.