I've read a few articles on the product from detailers. they seem to like the product but the dealership price on it is more for the warranty than the actual product. By having xzilon installed by the dealership, the paint is warrantied against oxidation and fading for 5 years; but there are loopholes in the system that don't allow most people to cash in on the warranty if something goes wrong with their paint.
The loopholes are that in the fine print, it says the warranty is void if you use a brush carwash or any not touchless carwash system...hand wash is ok. The way the dealership can tell if the car has been voided is by the pattern of scratches or swirls marks on the paint. Also no paintwork correction can be done outside the dealership.
Overall, the interior xzilon protection is outstanding, the paint protection is equivalent to a good sealant, and the price is for the warranty not the product itself.
IMHO - Purchase a DA, pads, polishes and learn to do it yourself.
I don't think it's worth paying the dealership that kind of price, but if you really want it buy it MUCH cheaper and apply it yourself, would definitely be better.