You can't be your best at driving with more distractions

I'm unalterably opposed and will do what I can to avoid having one of these in my car - ever.
Driving under today's conditions and with all the gadgets in cars, is an occupation of it own, and we don't need more things to worry about like some box recording speeds and side-pressure, then throwing numbers at you later and asking why they don't meat someone's idea of what you should have been doing under the circumstances. They could be helpful if used ONLY to determine cause of accidents and prevent future ones, but it doesn't work that way.