Huge volume boost. The higher volume/lower drive settings are pretty impressive. You can still hear your chords ring out but its thick. The pedal sounds amazing with both knobs maxed out and use your guitar's volume knob. The pedal housing looks like a military spec science lab top secret container: super sturdy, clinical precision, sharp. The LED can be seen from a mile away:) Just buy it if you are curious and set both knobs at noon to begin.