it's a simple bolt-on device to shorten pedal throw...basically inspead of having to floor the clutch between shifts, u end up disengaging the clutch halfway down the usual movement...I doh see why it'll make it any more difficult to balance in traffic except that ur foot will be a bit higher...u still working out your yuh calf muscles
think of it like replacing the long bands in those old dinosaur equalizers with one half the length...u get the same adjustment, just that u have a shorter distance to move it between min and max...
u might temporarily lose the accuracy with balancing because of it, but u'll get used to it I guess