speaking as someone with a working knowledge of the technology used to track drivers for insurance purposes (OBD2 and CANbus) Ive always been remarkably suspicious of this sort of black-box "we will save you money" proposition.<p>tapping into the CAN (car area network) system on a vehicle lets you see things like timing retardation and advancement, barometric pressure, o2 levels, and throttle body positions. it tells you what these systems are doing in realtime but it fails to tell you <i>why</i> these systems did these things. at best youll have to make a guess, and insurance companies seem to have an incentive to lean into the "because you drive poorly" excuse in order to minimize risk to investors.<p>theres no target and no set of parameters that define what an altruistically good driver is in the eyes of these companies, only the companies insistence it can "save you money" without explaining what you must do other than "be a good driver" and install their widget, which runs mystery code that interacts with one of the most critical parts of your vehicle that may itself not even be DOT approved..