I have an early laser guided adaptive cruise control system in my Infiniti. I love it, and it works great 98% of the time. Occasionally though, if I am passing a semi truck that has the red and white reflective stripes on the back bar, the car will slam on the brakes when I get close. Also occasionally on a hilly road, it will see a reflector ahead of us and hit the brakes. It also will exceed the set speed if someone pulls in front of me at a higher speed. I don't want to ever go back to old fashioned cruise control though.