I bought the Swollen Pickle due to my fondness for Muffs.
I already have a BigMuff on my board but felt I need another one to have more variety of tone of the same type at any given time during sets, so I have a heavy cranked low end as my main rhythm and a harsher brittle like for lead stuff. This is where the Swollen Pickle enters the picture.
The moment I turned it on what got to me was the variety of tones you can get, crunchy, fuzzy, scooped, shrill, etc. The filter is really really good at modeling your needs. The scoop and crunch knobs add such character to the sound. It really is quite variable and all of the possibilities all sound great, unlike some pedals where you get just one or two sweet spots. The SP you get sweet spots very often any way you turn the knobs.
It is very present, wild but controllable, and very well built.
All in all it's a great add to my board without compromising in quality . It is not a one-trick-pony nor a flavour of the month type. It's a Muff after all. It's a Muff whose add-ons really contribute to the users ouvre. If you're on the fence between a SP or another Muff, get this one.