The purpose of this is to extend your chocobo riding time while you dig. You can use it to ride from Windy to San, if that's what you want to do, but if you're a chocobo digger then this gives you more time to go out farther and spend more time digging.
I've noticed a significant boost just wearing the hand and foot equipment, which add the smallest values. Although I didn't time it, I rode my chocobo from Bastok to the entrance to Ghelsba, and waited for someone else to ride a chocobo there. He ended up waiting around for about 10minutes before actually grabbing a chocobo, then when he showed up I was still riding my chocobo.
guess it depends on what your going to do...you can make it from windurst to sandy on just 1 choco....so i have never used this gear guess if your trying to dig it could be pretty useful