Just got my Tech 21 British. Have been recording with it, inserting it between my guitar and my Jamup app on my iPad. Even using this less-than-optimal setup, and even using earphones, the British really impresses me. Both on clean and more dirty Jamup amps, it sounds really good, adding more depth, life and indeed crunch to the sounds. Thursday, it goes with me to a studio session, and tomorrow, I'm testing it in my live rig. I'm thinking it maybe even works as a dirtbox in front of my dirty amp, or maybe a semi-cleanish boost/tone shaper in the loop. We'll see. Stay tuned for my impressions, but so far, so freaking good! It delivers the goods. Very impressive and usefull tool.