Very good fuzz/octaver effect pedal. Since I use it on a bass, I would have liked to be able to activate the octave without having the fuzz engaged, for more versatility. The fuzz is very powerful, and the equalizer allows you to modulate the tone from dull/muted to fat/bright. The octaver has a very good response and does not sound synthetic at all. Depending on the placement in the pedalboard and the amp, a slight whistle that is quite acceptable, or nothing! Very good equipment: the build is solid, to be seen over time...