Tip: Go local. Take the transfer to negril then rent from Vernon's on beach road. First time we rented at the airport was nerve wracking. Managing to stay on the "correct" side while steering and shifting gears from the "wrong" side of the car, finding our way from the airport to the negril highway without getting killed accidentally going out of entrances to roundabouts. This was by no means our first trip---just our first trip driving. We were so flustered by the time we got out of MoBay and on the proper route we had to pull over at Old Steamer Landing for a few nerve settlers. BTW, this was one year after Gilbert wrecked the island and the guy whose family owned OSL and the land above it told us how they drank coconut water from their property for two weeks after the storm because the corporate water system went out and no one had fresh water. From then on it was Vernon's. Easy out, easy in and no worries about missing your flight home while you're trying to return your rental in the crowd at the airport.