There are many different iterations of these ceramic coatings. As mentioned, there are different year-warranty. I have this done on my daily driver (2016 Golf R) and completely love it. It does not prevent rock chips, but does protect the paint from contamination otherwise. My car is currently covered in snow and road-salt debris. All I have to do is hose it off with my power washer and two-bucket wash and it comes out smooth and looking like it did from the detail shop. Next time I get a new car, I'd do the clear film applied to the front of the car which protects from rock chips, and then ceramic the rest of it.