I bought this spacer to see if it would make daily driving better by not having to lift my for so much shifting from accelerator to brake AND to use for heel n toe shifting. I have to say that the spacer works well although I DID have to grind two opposite flats on the included bolts because the retaining grooves on the spacer were too narrow.
I also find that raising the accelerator pedal forced me to move the seat back several notches and now it's less satisfactory for the length of putting my hands on the wheel (using the standard of streached out arms the wrists should rest on the wheel, now I'm farther back and my palms rest on the wheel)
I'd say the spacer works perfectly but I'm not sure the concept is something I want to keep although that's just me. After three weeks I've had a couple of incidents where I didn't move my foot enough and several times I hit both accelerator and brake simultaneously then instead of lifting off, my instinct was to press harder so I almost jumped into traffic twice while trying to brake. Since my car is supercharged there's more power from the accelerator so even though I stomped down on both pedals, the car still powered forward. Just a 1/4" of my shoe was on the accelerator pedal but that was enough. So new users be warned that even though you might have the spacer set all the way to the right it still brings the brake and accelerator pedals into the same plain and close together and you have to learn a whole new habit of foot movement.