On my diesel truck I recently sold, there was a delay in the electronics between actually pressing the pedal and the truck reacting. I never tuned mine, but the common tuner (MADS Smarty) had “catcher” software that eliminated that delay and made the truck more responsive, reportedly to the point where it could be questionably scary to drive in the wet if you weren’t ready for it. I believe that the pedal commander does the same type of thing, removing the built in factory delay which you really can’t do with your foot. I’ll find out if it’s worth it or not when I buy one.