Now, I don't even think about it. I think it just a waste of money. If I need the function, I will install the rear camera or backup sensor to my Pilot. I think these accessories is more efficient.
I used to have one on my old 89 acura, when my kids were todlers. This was before you could temporarily turn it off. When I left the house at 5:30 a.m. I would wake up my family. Their euphemism was that I was "beeping out of the driveway."
My 1979 Datson 310 (great little car) had a beeping when you put it in reverse, but on the INSIDE of the car. Everyone always thought it was strange. Hey, you always knew when you were in reverse!!!