Do you use the backup camera on your car?

Many 2015 cars have them and most 2016 vehicles in the US are equipped with them now. By 2018 every light duty vehicle will have one.
If your car has one, do you use it? I don’t. I turn around to look. Always.
I’ve tried to use it to maneuver into a parking space. It is much easier to turn around and use my side mirrors. I’ve tried using it to back up down my gravel path to the barn. Nope. It is still easier to look out the back window.
Besides, the camera is usually dirty from road salt, mud or water making the picture a blurry mess.
Would I use it if I were disabled and could not turn around? It seems like a total waste to me.
Do you use yours?
Would the camera be more useful if it recorded and acted like a dash cam?