Well, since I'm relatively new at all this and it's also my wife's DD I run with MDM on at the track. I notice very little intervention, usually only on slow speed corners where it won't let me rotate the car. For me, the challenge is to be smooth enough to where MDM doesn't kick in and I find this to be a good compromise between lunacy and sanity at the track, for now. That being said, I used to track bikes and truly understand the point of smooth is fast, but don't really care about dropping a $6k bike vs. my baby so think I will still ease into things. Just giving my personal thoughts, as always, to each his own