I have the ampeg scr-di and I like it. I've used it as a di into the board at a small bar and sounded great. I play with it on the couchnightly with headphones playing along to songs or drum tracks. I do not like the -15db pad being inside the pedal. I feel you have to engage it if you use even slightly hot pickups. I also noticed that running this pedal as a preamp tone sculpting pedal before my amp cuts my signal regardless to if the pedal is on or off and reguardless to the the -15db pad is engaged. Great pedal. I am interested what headphones other people use with this pedal. I use iPhone standard earbuds. I also wonder if anyone has used their phone to play music or drum tracks through the aux in and heard a strange digital grinding cellphone wave sound.