Haven't used it, but it is just tapping into the tail lights and turn signals on the car to get lights on the trailer. And as a bonus it claims to use compatible plugs so you won't be cutting wires or wire insulation to do the tapping. Your chances of messing up the electronics should be minimal...I purchased a curt hitch for about $170 and have a body shop that will install the hitch for $450. Since they have to drop the bumper, I have also been thinking about adding the trailer wiring. Right now I am only using the tow hitch as a bike carrier, so I don't need any other lights. In the future I may need to tow a small trailer. Tekonsha makes a wiring kit #118785 for about $55 . I estimate the additional installation charge to be about $150. I am concerned with messing up the electrics. Has anyone used this wiring kit?