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I've monitored this topic for a couple of years on this forum. Truth is I have seen posts of getting nailed with both of them.
It doesnt hurt to have either one but you should think about changing your driving behavior. I am not saying dont speed, just saying you should know when you can get away with it and when you cant. Now some will have made claims to have never been caught with a certain model. That doesnt mean squat. Fact is your foot cannot react quicker than a beam or signal. Good luck.
I don't know that I agree.
I think they do help, but maybe not in the way that people think they do. With all the beeps and buzzes going off at every shopping center that uses radar to open doors, these things make you think there's a cop with radar every 50 yards, so you're always going slow.