I am not sure how i feel about poly blue… i have an old OC-2, and it is just glitchy. Poly blue on the other hand doesn’t glitch at all. I still need to find a way to use built in fuzz. Not because it is bad, but because it is very basic. It sounds how i imagine a random fuzz pedal that i wouldn’t buy sounds. This definitely doesn’t sound like original blue box, i tried it recently - blue box sounds terrible!) which is good in a weird way if you want an octave down fuzz.
So overall - all octave related about this pedal sounds flawless, too good to make you smile. Fuzz - very basic.
Maybe also the knobs irritate me, it is not pleasant to make settings, maybe i want sliders or some whammy style controls