I have Nationwide "on my side" and they have a SmartRide program, where they ship you an OBDII device that tracks your driving and give you 10% off premiums to start. If you drive like a grandma for about 6 months (a grandma that can still see well and so on - basically drive Super conservatively) Nationwide could increase that discount up to 30% - depending on how many red flags you set off during the 6 months: sudden acceleration/ braking, driving after midnight, etc. The discount will stay at least 10% for the life of the policy and the vehicle on it. Other insurers, like Progressive, have similar products. I got one of those things in my Model X and it was not registering any activity on their site after I drove around with it for about 2 months. Had them ship me another device, and this one is behaving the same way. Their site sees it installed, but no driving being reported. With the long ass preamble out of the way, here's the question: anyone else have one of those things in their cars and does it work for you?