On Friday, 8/22, had a Directed Electronics 9400T Back Up Sensor installed on my Graphite/Automatic Crossfire. Am very pleased with the quality of the installation, and my quick initial testing of the system, which includes four black nearly-flush quarter-sized sensors in the rear bumper and a buzzer located behind the screen below the hatchback in the cargo area. The parts came to $200 and the labor was $150, for a total of $350, plus tax. Had priced several systems from $99 ot $250, and considered doing the install myself, but researched and located a very reputable auto audio/accessory shop nearby that did an outstanding job, in about a half-day. They did have to remove the rear bumper to do the job--something I would not have been comfortable doing myself. The system beeps twice when the car is placed in reverse to indicate that the system is on, and then goes throught five steps of an increasing number of beeps as the distance to objects (obstructions or people) decreases from a distance of 5.5 ft down to a long beep at 1 to 0 ft. Had to get assistance from an observer for the testing, as the wall looked much closer in the mirrors/over my shoulder than it was in reality. Chose to install the sensor system because of the limited rear visibility and the fact that almost all of my parking is in garages, and occassionally in lots, where crossing drivers do not look for backing cars. Sensors are almost invisible on the graphite at 10 ft, and would be even harder to see on a black car. Was told by the installers that the sensors could be painted to match the body color with no degradation in performance (although I do not plan to do this). Will do more complete testing and post any additional findings/comments.