I have it, but I have it for one purpose only... Timing retard. If you dont need it for that, then I would sell it. I cant tell any difference between my car before and after the MSD(with the retard at 0 degrees retard) The only other feature you might use on it is the 2 step feature. But it is only useful on the track seeing as how it will just spin the tires on the street if you launch at 4000 rpm.