I used a mirror mount for my radar dector and the mirror tap power cord made for a clean and expert looking installation. The mirror tap is a must for mirror mounting the dector. Pros: No dangling power cords, Ash tray is closed, Just looks great Cons: NONE
Just as the title states, this is the only way but of course you'll need a blendmount radar detector mount and you tap off the power from your mirror rather than run a wire all around to the wiring under the dash. The system is neat, clean and looks like factory installed. It's also a great place for a radar detector - high and centered.