I originaly learned about the Klon by spotting it on Joe Perry from Aerosmith's effects board at a show ! I saw when he needed to send the amp into growl mode he kicked on his Klon ! Then when I saw Brad Whitford was using it for his superior rythm tones I just had to have one !! It is now the pedal most likely to be crazy glued to my board !! If you have a great amp sound already the Klon just gives it a bit more hair where it counts !! Any other Klon users here to give some reviews of the pedal !!