There are many benefits to having any professional coating applied. I also had CQuartz Finest applied, and for me the number one benefit was that my dark car looks clean longer. Second, it is a breeze to wash and dry. These coatings all have some hydrophobic qualities that allow water to sheet off with the proper rinse technique, leaving very little behind to be blotted off with a quality microfiber towel.
Every time I wash my car it looks like it just rolled off a showroom floor. If you can find a true professional detailer, it's well worth the money (Shout out to Aaron Bodle of Masterwork Detail in Tampa!). Having it done when the car is new should take less time and money as there shouldn't be as much paint correction needed... although even a new car can have lots of swirls and scratches.
Aaron spent time showing me proper wash technique as well as gave me a list of products he has found work well. Surprisingly, the products he recommended were not pricey at all. He also instructed me on proper care of my microfiber towels (no heat drying, people!)
I'm so impressed with how my car turned out, I'm having my bf's brand new Camaro done soon... It literally came out of the showroom with a crazy amount of swirls. Aaron will have a lot of work to do, and it's black so they really show.