I bought this fuzz in addition to EHX Triangle Big Muff and it compliments the big muff well. It is a quite different sounding fuzz pedal that offers a lot of options for tweaking and looking for a particular sound.
Fuzz tone is very subjective and I prefer to Big Muff for soloing (buckets of sustain), but I prefer Keeley Fuzz Bender for rythm playing and in my opinion, it works nicer with overdrives, boosts and distortions. Big muffs seem to get very noisy, but Fuzz Bender seems to behave nicely.
This pedal has 5 knobs on it, which means that you can do a lot of tweaking and get different fuzz tones out of it. It took a bit of time to get used to it and to fine what i like, so i would recommend it to people who enjoy tweaking and looking for sounds. If you want plug and play with minor adjustments, then this pedal can be a bit overwhelming.
An interesting thing i discovered is that when i run this pedal into a big muff (guitar - fuzz bender - muff), then i can get the big muff to behave a little bit better volume and sensitivty wise. I guess this is not unique to only this pedal, but interesting nevertheless.
I'm definitely happy that i got this pedal and i find it useful when i want to replicate different fuzz tones with one pedal.