Most people don't need an "invisible" radar detector, experts say: Radar detectors are perfectly legal in most states. However, they are illegal in some localities and for drivers of large commercial trucks. The Escort RedLine is one of two under-$1,000 radar detectors that manage to elude police radar-detector detectors in tests. The other is the Beltronics STi Magnum (*Est. $150) -- a very similar detector (both are made by the same company) that costs a little less. Both units are among the best at detecting radar in tests, too, even at long range or behind hills. The RedLine holds the edge in reviews simply because it has been tested more; as of this update, the Magnum had just hit the market as a replacement for the perennially top-rated Beltronics STi Driver. Still, for most drivers, experts say the top-rated Escort Passport 9500ix (*Est. $500) is the best choice. It isn't invisible, but the 9500ix has something the RedLine and STi Driver don't -- a GPS chip that allows the 9500ix to know where speed cameras, red-light cameras and speed traps are, and it can warn you in advance to slow down.
SpeedZones.com and RadarTest.com conduct exhaustive tests of the Escort RedLine and compare it with competing radar detectors. "Radar Roy" Reyer provides an in-depth video review at YouTube.com, and another one at Amazon.com, as one of more than 30 owners posting reviews of the Escort RedLine.
The Escort RedLine is one of only two under-$1,000 radar detectors that prove invisible to the latest Spectre Elite radar-detector detectors in SpeedZones.com's latest test (the Beltronics STi Driver is the other). It's also one of the best at detecting radar, even far away or behind a hill.
Review: Annual Radar Detector Test 2011-2012, Editors of SpeedZones.com
In this extremely thorough test, the Escort RedLine beats the Valentine One at every type of radar detection but one (long-distance, around curves, photo radar, etc.). The Valentine One does better at long-range detection of radar coming from the rear of the car. The RedLine also proves easier to use and gives fewer false alarms, Craig Peterson says.
Review: Tested: Escort RedLine vs. Valentine One, Craig Peterson, Updated July 17, 2011
In Roy Reyer's cross-country road trip, the Escort RedLine "just basically smoked all of its competition," including the Valentine One, at long-distance radar detection. He highly recommends it for those who want pure highway performance, but he notes that this model lacks GPS to detect the speed and red-light cameras that many cities use.
Review: Escort RedLine Radar Detector Review, "Radar Roy", Aug. 10, 2009
The Escort RedLine maintains an overall rating of 4.5 stars (out of 5) with more than 35 owners posting reviews. One is a video review by professional tester "Radar Roy" Reyer.
Review: Escort RedLine Ultimate Performance Dual-Antenna Radar Detector, Contributors to Amazon.com