I agree with whats been said in here mostly. The radar detector cant save you 100% of the time but if you learn to "use" it properly its can certainly help. I wanted to add that one thing I've noticed is if you do get pulled over with one you are more likely to get a ticket because cops seem to love still getting someone using one. Then again I got a ticket a couple years back where he had no radar on and tried to play it off like he did. I mentioned that my detector didnt go off to him and he changed his tune a bit. Granted I still got a ticket but for 30 mph less than he was originally saying (which was way out of whack anyways). But yes radar detectors are a grear tool if used properly.