Universal Audio UAFX Dream '65

I use this pedal mono in the fx loop of my Helix. I was tired of never being able to nail the slightly overdriven blues and rock tones! Huge improvement. It really reacts like a tube amp. My guitar sounds so much more alive through a PA. A nice surprise is that the mods are really useful as well. Makes this unit really flexible... also the spring reverb and the the tremolo effect are phenomenal, but unfortunately especially the spring reverb really benefits from being used in stereo.