It takes longer to get thru the line at Fox, Advantage & Payless as they don't have their system set up like Dollar's Express where you can have all of your information saved there and then it is only a matter of showing your DL and CC and then off you go. They slow down the process with all of their pitches for buying their insurance for the car, pre paying for gas etc. Other than those little annoyances up front they aren't that bad if you're hoping to save some $$$ on your rental. I don't think that you can earn any airlines miles with Advantage. I believe it is Fox where you have to catch 2 different shuttles to get to their place, which is not at the rental center with all of the other car rental companies.