Is paint protection worthwhile?

I’ve just bought an Audi A5 3.0 TDI and was offered a paint protection package that came, not surprisingly, with a hefty pricetag. When I challenged the dealer on whether or not it was necessary I got what I thought was a vague answer. Furthermore, NRMA seem to cast doubt on the value of these products on their website. Whilst my car is not garaged, it’s well looked after and I just traded-in a 10-year-old A4 with paintwork that was in great condition. Are these products worth the money?