I have used Island 3 times now and they are great. I have found cheaper rates, but chose Island because of their reputation and because they are a larger company with multiple locations in case anything should happen to the car. Our last trip we drove from Mobay to Port Antonio, then Kingston, and then across the south coast to Negril. The roads on the north coast from Negril all the way to Port Antonio are a breeze. The south coast is another story. From Kingston to Mandeville was good, but from Mandeville to Negril the roads got pretty rough, especially around the Whitehouse area.

You may want to check rates at www.carrentalexpress.com

I just checked rates for a week in March on car rental express vs. Island's website and they are $25 cheaper a week. I have booked through them once, but the last time I called Island and told them about the cheaper rate and they matched it.

Safe travels