OTOH, I'm thrilled with my backup camera which contains a warning light and beeps to warn of cross-traffic approaching from left or right; the blind-spot warning light in my door mirrors when a car is in the blind spot (how many times have you changed lanes only to have the car on your left blind spot blast his horn?) and the green, yellow and red marks on the backup camera that lets you know exactly how close you are when backing up. I think you can retrofit one and I think all cars should have them. Every year someone backs over a kid or something else. I also have Bluetooth connectivity so if I get a cell phone call, I never touch my phone but hit the on button and just talk like I'm speaking to a passenger. Not necessary but a safety feature and nice to have if you're still in business as I am. I also installed a compass mirror which comes in handy when driving in a strange area at night. I don't have a built-in GPS because I still use a 6-year old portable Garmin. Besides, a friend had a GPS go bad in his Camry and the replacement cost was $4,000.00. He bought a new car instead. Except for the backup feature, I don't look at the screen at all. I change radio stations by a button on the steering wheel - same for the cruise control.