A certain smart*** in my house told me I didn't need this option. I could just reach behind the car from the driver's seat and feel to see if anything was there. I wish now I'd gone for it. He certainly makes extensive use of his in the small planet he calls a pickup truck that he drives!
I went with the rear sensors over the camera, after being told that Park Assist was no longer available (to my complete dismay.) I figured I've had sensors in the past and have yet to hit anything, despite them being a bit over sensitive at times. Cheaper option than the camera.