Bogus
I believe these things are bogus. Do a search on the Zaino board at Edmunds Townhall, and you will hear of many people destroying these offerings from the dealers. I don't care what quality wax you put on a car, if you have birds crap on it, sap from a tree and wet leaves bake on the hood, you WILL have damage to your paint after time.
I agree with getting a good leather cleaner and conditioner for the interior of your car. When I purchase my used '98 GS400 6 months ago, the finance guy was pushing me HARD on the protectant for the interior of the car. He kept saying, "you have the IVORY interior, that will stain in no time. You have to be crazy to not get it!" My only reply was, this car is used, and has been driven for over 3 years already, and there is not a single mark on the inside. He had to think it over for a sec, then he shut up.
Save your money and buy Zaino, Lexol and scotch guard. Send the rest to me in a check as gratitude.