I have not used that one. But I have a fair bit of experience with, well I can just say cameras.
There are 2 completely different camera systems, have completely different views, zero interchangability.
There is the typical back up camera. This is what every new car has, actually required by law these days. Wide angle, wide field of view. Useful for backing and parking.
The other is a rear view mirror. Very narrow field of view. Useless while parking. But usable while driving when you don't have access to a clear back window. I think these are often called 'smart' mirrors. A few OEMs use them, don't know if they infiltrated the aftermarket (or if the one in the link is one).
Personally I don't like using them. When looking at a regular mirror your eyes don't focus on the mirror itself. Just like the eye doctor office that uses a couple of mirrors to get the long distance vision in a small room, you look at the image reflected on the mirror, not the mirror itself. Going from looking out the windshield to looking at the mirror your eye remain in a distance focus. But the display is different. You are looking at the display itself. To look at the display 'mirror' image your eyes go from a distance focus to a near focus. Drives me nuts.
Another thing about a real mirror. You can move your head around and get a bigger image. Something is just off the edge of the mirror, move your head and see it. The camera based system, that image is all you get.