No way is this a good fuzz box for guitar, sorry. It is decent as a bass DI when you turn up the fuzz slightly.
The mic preamp has HUGE amounts of gain. Background noise isn't a problem. It's a decent clean preamp. Turning up gain to tube distortion is fine in tiny amounts. Additional distortion is tolerable in a lo-fi garage kind of style. But it's not "buttery, warm, gooey", etc.
I had pretty good luck with compressor and EQ.
It's a very flexible unit, with tons of buttons and knobs. But it's hard to operate with all the TINY buttons and labels. WATCH OUT
for the invisible +20 dB
The preamp/compressor/eq have separate send/receive connectors in back, which is nice.
The VU meter and sophisticated appearance will impress your friends