The biggest issue I see is the real reason for the gadget. It is marketed as something to record your "safe" driving habits to receive discounts. The truth is more like data they can use to raise your rates. If some yo-yo pulls out in front of you and you slam on your brakes, swerve, and accelerate to avoid traffic, you avoided a crash. You are an alert, safe driver. However, they will look at the data and see you are an erratic, aggressive driver. Therefore, your rates must go up.
Because it is a company's policy and not the government's law, I don't have too much of a problem with it. I don't like it or want one. Therefore, I choose not to do business with them and will do business with a different company. That is how the free market works.