I considered it but after doing research I decided against it. There was a penalty for braking too hard. I commute about a mile to a metro station parking garage, so I'm in the car about 15 minutes a day all together. I paid attention to the number of times I stopped hard over a week. It was several times in that week at least, and honestly most couldn't be avoided. I braked hard for a jaywalking pedestrian that popped out from behind a bus, a car that suddenly slammed on its brakes in front of me, things like that. The idea is that it makes a noise (I think) when you do it and you're supposed to learn how to brake more gently. I could see that if you were a hard braker in general, and how that could cut down on the likelihood of an accident, but I don't think it's built for urban car commuting, even if it's a short distance.