Ask any bike expert worth his salt, putting in a fresh set of cables is one of the best bang for your buck bike fixes you can do to liven up your ride. And if you are still using your bike's original housing and cables, you will be really in for a treat when you swap in Yokozuna's.
"I would venture to say that the brake cable and housing combination is the smoothest, most solid I have ever used. Squeezing the brake levers, the cable pull is consistent and easy, and when the pads hit the rim, zero flex or sponginess is felt. - Velo News on the Reaction Cable System