I have the digital camera but the view is not what I'm after. It definitely works, but I only have the digital camera that's mounted up in the backup light fixture. It shows more of what's behind me than just looking in the regular mirror, but once you hook up you trailer I don't think you'll see much else. I think the separate digital camera that can be mounted where you want it could give me a continuous rear view, if I mounted it on the back of my trailer and ran the wire up to the truck. I believe it's option XH7 and I thought I was getting it. (I know I'm the only person who got confused about the multiple camera options while ordering my truck.) I think it will be easy to retrofit it, but I haven't looked too hard at it yet.
My plan for the digital mirror and the 'movable' digital camera was to put it in a horse trailer to keep an eye on the animals, and/or set it up in the truck bed looking at the goose ball from the side when hitching up. The main screen cargo camera shows a great view of the goose ball and I'll be able to get straight on the ball but I expect it will be tough to judge when I'm directly under the trailer receiver, i.e. too far forward or back. I'm going to try it a few times before I spring for yet another camera. (I also have the 4 camera kit to provide a surround view of my fth wheel.)
All of this stuff is going to be great for hitching and maneuvering the trailer. What I'd really like while going down the road is that 'Trailer Reverse Guidance' view where your truck and trailer look like a really skinny submarine and you can see back on the lanes to your right and left on a multi-lane highway.
The technology we have in these things today is incredible. I remember when a pickup truck was just a motorized wheelbarrow for hauling crap around the farm. The first pickup ride I can remember was in my grandfather's pre-52 Chevy, hauling live chickens to market. He would have thought floormats were a stupid idea.