tip of the hat to the Sex PIstols (also the reason for the colour scheme).
It is a smooth but high gain distortion. Those after JCM800 stack or rat type distortion would be very at home with a Swindle (and probably surprised by its ability to clean up).
It is ragged around the edges.... but in a good way.
Clean Boost on Left knob & Input gain on Right knob...
Trust me... You will appreciate everytime you use it. :)