It's been my experience ( over 3 MILLION miles and counting) that NO detector will save your butt from a cop sitting quietly in the dark holding his finger on the "button". Only thing they're good for then is to tell you: "you just got a ticket". Since the speed limits were raised, I've had only a handful of tickets vs a butt load before. I now keep my speed to around 10+ over the limit. 99.9 % of the cops won't even look at you there. Also pays not to apply the brakes when the detector goes off. And do not make eye contact with the officer when you pass each other, just turn your head and look as if you're off in another world. Most figure, you're fat dumb and happy and let you slide. You'll spend less money feeding the dector companies this way vs a few dollars for an occasional ticket. None of my tickets for the last ten+ years have gone on my record. The court only wants your money, offer to pay them whatever, just as long as it's kept "off the record". Most will.