Any "worth it" radar detector soon pays for itself by enabling you to avoid speeding tickets and higher insurance premiums. There's also the added, unquantifiable benefit of being able to drive with confidence, free of paranoia. Of course, if you've owned a radar detector in the past, you know that false positives can ruin its effectiveness, making the device merely a nuisance. Enter the Escort Passport Max, a modern detector specially designed to hone in on police radar, while blocking signals from the radar employed by the cruise control of other cars, the automatic sliding doors of nearby buildings, or other things on the road that'd confuse a lesser device. Available at Amazon; $278.34.