I personally have no use for distortion pedals or gain buttons. American Tele straight into the amp. Boss RV5, Boss DD7 for leads, and a Boss CH1 every now and then. Amps: New Pro Jr 111 with a Weber Signature speaker, Blues Jr 111 with a Cannabis Rex speaker, and a Fender Ultralite Jazzmaster if I need lots of clean volume. 250 watts worth. I recently added a Boss 59 Bassman pedal to these amps. Tell you what. It is one of the best things I have done for tone and balls. Its not a distortion pedal. Its more a preamp in front of your pedal chain. You can look at it as it turns your guitar or amp if you like into a 59 Bassman. But it doesn't weigh 50 pounds. My solid state Jazzmaster is super clean. Run up the volume and its still super clean but louder. Add the Bassman pedal and stand back. Its now a 250 watt tone monster. The little Pro Jr I like it just cranked but the pedal does the same to it. In my opinion the only thing the Blues Jr has going for it is it is not in the 40 to 70 pound class of tube amps. Even with the new speaker Fender puts in it, the little PJ sounds more Fender tube to me. If I had not got a smokin deal on the BJ I would have never bought it. The Cannabis Rex helps with the piercing treble tones. OK enough BJ bashing. I ran the Bassman pedal into the BJ and it just became a smoker. Now we are talking turkey here. I have never done the mods everyone talks about to the little amps. May as well just buy a Deluxe and be done with it. To my thinking this pedal will give you more than you can imagine tone and added volume. It does have gain which I did not even get into. Maybe just on the edge of gain perhaps. OK thats it. Has anyone else tried one of these pedals?