I have used them numerous times and actually had no problems.
But I would not be surprised if they profile their customers for example (horrid example) try to take advantage of a single mother with kids in tow when pushing extra insurance and coverage.
They are off site but they are on the way to Disney.
Their shuttle takes you (other rental cars can follow) out the north exit (436; Semoran) and left at the first light (Frontage). Under a mile is their office and also a 528 (Beach Line) toll booth you pass free to the side of. Leaving their office be very careful not to go out the wrong way where fingers in the road rip the tires. Turn right (west) instead of their suggested left. Less than a mile is next light (Conway) where you take two quick lefts to get on 528 westbound. Watch carefully for an "exit ramp" to pay the toll in cash. Then on to the end of 528 and take I-4 west (southwest) to get to Disney.
Returning to airport, take I-4 East (northeast) and change to 528 East. Again, on 528, use the "exit ramp" to pay the toll. Get off at exit 9 (Tradeport). Left (north) and cross under. Nice cheap gas station on the left. After getting receipt and with the gas station at your left and possibly rounding a corner to face north again, get into middle lane. Required right (east) onto McCoy. Payless is less than a mile on the left. (Other rental cars can continue less than a mile to next light (436); turn right to enter airport.)