If you're new to 5* or PC, don't forget to call Hertz as soon as you hit 10 or 40 rentals and ask for a complimentary upgrade to 5* or PC status instead of waiting until the next spring for the upgrade to happen automatically. I find the "Guaranteed" upgrade to be a very hit or miss. At a recent airport, "But that car is a standard class car and I should be in a full size car." "Sir, your reservation is for a standard and you're in a standard car." "But as a PC, shouldn't my guaranteed one-car class upgrade place me in a full size car?" "Well, that car is a type of upgrade . . .an upgraded standard instead of a basic standard."