akranger, I have some dealership accounts that push this on their customers as an aftercare car service and with being a Detail Shop owner and a car owner I would not ever recommend wasting money on that stuff. If you smell the stuff before they apply it to your car you will never let them do it. Since your buying a new car I think your best bet would be to get your hands on a quality sealant and maybe save yourself $750+ bucks!!!
P.S. 5 years protection on paint without the product auctually being a clear coat of paint is most likely not realistic at all(maybe 6 months and thats pushing it)
Just thought I could share some first hand knowledge with you...Good luck with the new car!