The primary function of this pedal is to color the guitar tone via "cocking" the signal at given points of the "wah" sweep. The on-board fuzz adds the ability to dial in some classic rock tone/feels. I immediately wanted to be able to "uncock" the wah, so I added the EHX Next Step Expression pedal. The talking wah feature sounds wicked. The ability to switch the fuzz tone between preceding or following the wah effect makes for a very versatile fuzz range. The mix of fuzz and wah makes for great added expression in heavy riffing.