these units are not going to lower your rates. I would never voluntarily offer to give away this sort of data.
think about how you enjoy the capabilities of your car, everytime you stomp on the excelerator it goes down as aggressive driving, do you really want that?
Not to my insurance company, who is going to use it to justify either higher rates or denying coverage. Read stories from people who have used hands-on auto insurance like this, or Tesla's. You go one mile an hour over the speed limit sometimes and you're penalized. You stop suddenly to avoid an accident, you're penalized. You accelerate rapidly to safely join traffic on a short on-ramp, you're penalized. They lure you in with promises of discounts, but it ends up being worse. You just might not notice how much worse it's become until you submit a claim.
While these are marketed as safe driving, if one drives the speed limit on an Arizona highway it will become dangerous. Drivers of other cars will give you the finger as they pass you. You hope that they are giving you the finger as road rage is common in Arizona. It shouldn't be an issue if one drives in the right lane (as one should if one follows the driving manuals) but it is because so many drivers drive randomly in each lane that faster drivers are forced to "weave" in traffic.
Driving ten miles over the speed limit on a highway in Arizona has, in practice, become the new minimum and many drive significantly faster. The same applies to many city streets. The state highway department and state police (and certain cities) have even gotten to the point where they designate certain stretches as "safety zones" with signs warning that the speed limit will be enforced with no speed buffer.
