I'm going to have to chime in and say that I DID get suckered into the stupid "protective" coating from the dealer!! Haha..
I've had the car since Feb. and still haven't gotten it done though.
I don't think that they sold me on the fact that some kid would be rubbing some Turtle wax on my car but they said that after the "treatment", if anything were to happen to the paint in any way, they would repaint the affected area (or whole car) at no cost to me. Sounded worth it at the time considering I paid extra for the color I got anyway. lol
Now the one thing I NEVER fall for is that lame extended warranty. You know... the one that extends the dealers pockets with your money.