Made a trip to Jacksonville over Thanksgiving, the 8500 worked like a charm, on the way back I was crusing at 85 and a Black Honda Civic passed me at about 90, about a mile down the road the 8500 started beeping, so I slowed to 75, two miles latter a State John was just pulling out of the bushes, flew by me in a Camro and pulled the Black Civic over. Worked Great!

Saved me about 5 times - Busy Weekend for the Troopers.
P.S. In Florida you get a ticket at 82+, depending on traffic and location.