A quick comment about the Valentine 1. It's an awersome detector as far as detectors go. Escort however has already been neck-and-neck with the V1 (endless debates about this topic) and with their introduction of GPS into their newer detectors, Escort certainly appears to have the upper hand for the moment. It's only time until Valentine does the same.
I chose to go with the Escort Passport 9500 ix instead of the V1 primarily because of the internal GPS. I appreciate the reminder of red light camera intersections ahead and speed traps... It also identifies false alarms along your usual routes and blocks them out keeping it quieter on my daily commute. So far I'm pleased with its performance.
I have not had experience with V1 but understand it is a great detector. It was my second choice. I wish the Escort could communicate the direction of detection like the V1 does.
I installed the detector using an Invisicord & Blend Mount. It is a nice clean setup and the detector is easily removed when I park the car publicly leaving no suction cup marks on the glass for the would-be-thief to easily identify my car as a target.