Just rented a car in San Diego. There was one car in the category I rented. I went back to the kiosk and told the gal that I had an upgrade coupon but I wasn't sure if it would be good (memorial day week-end). she told me to pick out an upgraded car, mid-size to full size (Ford Taurus). Their system was very fast both for pick-up and drop-off. Always get good rates through smarterliving.com

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Ms.DtG