Guess depends what car it is, tried a few newer E class out with it on and been impressed (in the 30 miles I did), even had someone come from lane 3 into lane 2 (where I was) then straight off a slip road, car braked consistently (made a bonging noise) just as I was going to brake, then seemed to count to 5 and then slowly caught back up with the car infront at same distance and speed I was doing before. Handy!
Tried a slightly older Volvo with it (2010?) and it didn't like rain or any other vehicles going same direction so motorways with narrower lanes it kept turning off or just dropping way back.
Did it bong and put lots of flashing lights up on the dash too? I know the jag XF made lots of noises and flashed up lots notices wanting you to interact/intervene. But that was quite a few years ago.
Guess depends what car it is, tried a few newer E class out with it on and been impressed (in the 30 miles I did), even had someone come from lane 3 into lane 2 (where I was) then straight off a slip road, car braked consistently (made a bonging noise) just as I was going to brake, then seemed to count to 5 and then slowly caught back up with the car infront at same distance and speed I was doing before. Handy!
Tried a slightly older Volvo with it (2010?) and it didn't like rain or any other vehicles going same direction so motorways with narrower lanes it kept turning off or just dropping way back.