Picking up the car at Orlando Airport was very convenient. After completing the paperwork, you can go to the parking garage across the street and pick up the car, with the key already inside. Returning the car in Key West was also easy. Since I had an early flight, the office wasn't open yet, so I parked the car on the first level and put the key in a black drop box. Overall, it was very convenient. Because I had no prior experience, I did not rent or purchase a SUN PASS card. I drove through a SUN PASS lane and expect to receive a toll fine, but I have not yet received any notification.