Lately I've been searching reviews on radar detectors and also radar jammers.
From the reviews the Escort Passport Max 2 took out the #1 spot.

Radar Detectors Review 2015 | Best Laser Detectors

With radar jammers, Radars Direct sells them. They're also based here in Joondanna. The Laser Interceptor Dual apparently is the worlds #1 jamming system.

Laser Interceptor Dual System | Laser Jammer Parking Assist

I'd rather cop a speeding fine on the chin if my detector didn't work for whatever reason (rear facing or otherwise) than be fisted for have jammers fitted to my car.

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I had laser interceptor in my last rex. Doesn't work very well for aome reason.

using the Perth-WRX mobile app

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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport

"I swear officer, I bought the car with these after market laser parking sensors"

:P

using the Perth-WRX mobile app

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2005 WRX STI

V1, often get reflections. Paid for itself numerous times over. With rear facing its hit and miss but nothing is fool proof.

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Bitches love cardigans

I run laser interceptor and V1.

LI works a treat, although it only jams for 4 seconds (can probably change this), but that's enough to hit the brakes unless you're doing a stupid speed.

V1 works great, not so much for rear facers. A lot of it depends on how the camera is positioned too. I do ~700km of highway driving per week, and it always works.

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R33 GTR - 550hp
Barina - Daily