Got a GSP in this week and tried it out at rehearsal last night. This is my first Jetter pedal. I've read an opinion that this is the best Gain Stage yet....and if that's so, I don't know that I'll be trying any others. It's a great gain box but didn't really impress me a whole lot. Just kinds of sounds like many other boxes out there in the same category. Not bad but nothing special or unique, kind of average sounding really. And I had it cranked. I actually still prefer my OCD v3 over the GS Purple. Just an honest review, take it with a grain of salt and of course, YMMV.