First of all, it is unexpectedly loud! Something that I didn't expect from such a compact combo.
I really love the lo-fi fuzzy nature of its sound. Clean sound is almost imposstible with it, but I play mostly with Ram's Head Big Muff anyway.
Don't forget that you can open the case and you basically have a primitive tone control.
Now I mostly play through Harley Bentron Tube15, but everytime I connect to Pignose it makes me smile because of how authentic it sounds.
And of course the star of the show - it runs on batteries, so you can take it anywhere.