On our third island in Hawaii on our honeymoon, we used Hertz rent-a-car. We had a very hassle free experience with them. We arrived at the airport and a shuttle brought us right to the Hertz rental site (there was also one that brought us back when we dropped off our car- very convenient). We were able to upgrade to a jeep without reserving it in advance which really made our day. And there were no hidden costs in our rental which was great. The vehicle was also full of gas and very clean. We will certainly use Hertz again when we rent a car.