one word "dynamics"
all my guitars have to be loaded wt .001uf caps and 150kohm resistor, it works great on any medium power drive pedals and amp distortion.
really good on tubescreamers, blues driver, and SD-1, SD2's.
oh yeah and they work best with low output pick-ups, and for this reason that i'm not too excited wt high powered pick-ups
I use ceramic disc capacitors. Piso lang isa
ako din, pero i've tried different types with little or no difference, ceramics and mylars are cheap ..... i have a stash of them kahit available naman siya kahit saan electronic shop.
to me its not a "mod" na nga eh, its like a pre-requisite on all my guitars, i had them on for like 16 years or so