Just thought I would mention my recent experience with National and the Emerald Aisle Club. We were in Florida over the Easter Break and picked up our rental car at the Tampa Airport. Even though I had printed my confirmation from my on-line reservation, the woman in the booth would not honor my confirmed rate. My total was different plus they charged me $5 a day more because my husband was driving and the Emerald Aisle membership was in my name. Apparently, the rules had changed effective April 1st. Rather than waste my vacation time trying to argue the amount, I called when I came home. They were very helpful and credited my credit card for the additional charges since the new rules were not in effect when I made the reservation.