Advice on installing reverse parking sensors on car?

I was wondering whether it's a good idea to have reverse parking sensors fitted to a car by the place I purchase the sensor from..any good or bad experiences?Advice on installing reverse parking sensors on car?
I recently installed a system in a SUV for a customer.It consists of a tiny camera built in to the license plate frame and a small display that mounts to a convenient spot on the dash.It is wired to work only when the reverse lights are on.For the $90 it cost and simple installation it is a very useful safety feature.Advice on installing reverse parking sensors on car?
all cars have then ,

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