I have been looking for an octave pedal to fatten the overdriven sound of my Godin Exit 22 guitar. That is because usually more gain does not give more feeling of heaviness. So I wanted not-so-much-gain signal to sound massive and this pedal gave me that. Every time when I click the button, I feel the power of what I am playing.
As there are disscusions about delays, slow response etc. compared to other pedals (example mini POG), I must say, that I haven't experienced any of this: the lower octave perfectly goes along even when I am playing fast legato notes.
I do not use octave up function usually, beacause it is not the thing I needed, but I am keeping the knob at about 9 o'clock, so it adds a little obertones, which is not very cleary heard, but makes the sound fuller.
Works perfectly both with humbucker and neck pickups.
All in all - if you are looking for an Octave pedal, I do not see any reason not to buy it.