I've used Island Car Rentals before and found that experience to be "not bad". Lots of paperwork but once you're entered into the system there will less for the next time and they have a desk right at departures just before the exit door. I don't like renting a car where you sign and pay, and then they bring the car to you. I like to see what I'm renting and making sure all the lights work and the tyres are good. I didn't have that option with Island. Might I suggest coming to Negril first. Happy World or Elvis Car Rentals are good in my books.