There is little on the Hertz web site specifically addressing advantages of being Gold; these days what is there is all about Gold Rewards and how you can get free days, etc. There's several old FT threads in which people say they have been told by Hertz that if they are Gold they don't need to register their spouse as additional. But I don't see that at this point so it may have changed. Of course if I need to stop at the booth every time I rent in order to sign up my wife, even if free, this does take some of the fun out. My next couple of rentals are solo so doesn't matter but both are small offices so maybe I'll have a chance to ask.