I don't know if it's any better with or without it, but when I ordered my car it was part of what the dealer called the "Platinum Package" which included rustproofing, undercoating (I believe), paint protectection/sealant and protection. I believe the dealership put a warranty on the paint protection, but I forget for how long. Most people will say that it is just another way for the dealership to get more money from your wallet, which I tend to agree, but there are some things I'd rather not gamble with and an expensive purchase of a car is one of them.