Does anybody use or recommend radar detectors? Just got back from a ride that could have turned out much worse than it did. We were all given warnings for 74 in a 55 he said there was no way to prove which of us or if all of us were speeding. We were rounding a sweeping corner and unmarked trooper was in oncoming lane and he said he clocked us. I don't believe him and he admitted it wouldn't hold up in court hence the warning. Do radar detectors help or work as well as they claim or are they a waste of money?