At least, I hate them when they don't work.
My wife headed out with the grandkids this morning to do a little grocery shopping. Two minutes later, she was back because she was unable to move the gear selector on her Lincoln MK VIII out of "PARK."
Spent the whole goddamned day trying to track down a problem in the brake light circuit; something kept blowing a fuse, which meant no power to the solenoid that keeps the gearshift lever from moving out of "Park" unless the brake pedal is depressed. Eventually, with a little help from the Internet, I finally determined that the voltage inverter for the cool but non-essential full-width neon brake light on the trunk lid had failed and shorted out. Unplugged the bastard and now everything is working again. I am thankful for the Web; this is something I probably never would have figured out on my own,
Did I mention that I hate cars?