How reliable or useful are radar detectors in these days of speed cameras and unmarked police cars? I rarely see traditional "speed traps" anymore; rather, I see more police driving unmarked SUVs, Mustangs, and Dodge Chargers.

Just wondering.

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2011 Panamera 4S...GT Silver / Espresso
2012 Mini CooperS convertible
2008 135i Convertible - Sparkling Graphite Metallic
Prior BMWs: `05 645CiC; `07 650i; `08 M6 convertible; `11 750ix MSport
2004 GX470