It can protect from small things that might fly up into your paint. Of course, it also depends on what would be potentially causing the dent. It is certainly not bulletproof but if you are talking about wear and tear on the paint from daily driving, highway driving, and road trips then it is definitely worth it. It is a far cry from Turtle Wax. Conversely, there are more and more DIY ceramics becoming more affordable and easier to apply. I may look at doing that down the road, but I will leave it to the professionals for the first go round.
Initially, I found a high end detailer. I pulled into the lot and there was an Audi R8 in the lot, a brand new BMW X7 and Lambo getting worked on inside. They keep your vehicle for 7 to 10 days depending on what you get. I priced getting Paint Protection Film and Ceramic. The total would have been about $4K. The ceramic was rated for 3 to 5 years and would go on top of the PPF. As I said, it varies and there are a lot of options available.