I have not used the Power Stop Z26 carbon-fiber
ceramic pads before, but the I have used similar Hawk HPS 5.0 carbon-fiber
ceramic pads on another car(2014 KIA Optima SXL 2.0T) which dramatically helped stopping distances. I assume the the Z26 pads will perform as good as the factory pads or better. I would purchase Hawk pads, but they are not available for my 2015 Genesis.
I usually just change my rotors as well when I first change my pads if the mileage is past 60k. Most pads last about 60k miles or more so I will not have to worry about another pad/rotor change for a long time.
Hawk HPS 5.0 pads which are similar to the Power Stop Z26 pads.