I have rented from Payless numerous times and had no problems at all, knock on wood.
As with all car rentals, mark down on the form provided all preexisting damage to the car body, seats, and windows, make sure the jack and spare tire are there, make sure the license plates match what is on your paperwork.
Note: Payless is one of the companies that reserves the right not to rent to you if you neither buy their collision nor own a car with collision insurance back at home.
Disney hints:
http://members.aol.com/ajaynejr/disney.htm
Leaving the Payless lot for Disney, turn right instead of their suggested left. Then two lefts close together at the next lights get you onto the Bee Line (Beach Line) Rte. 528 bound for I-4 West and Disney.
Coming back via I-4 East to 528, get off 528 at Exit 9 Tradeport/Conway. Left and cross under, nice gas station right there to top off, get into Middle lane, required right onto McCoy, Payless is on the left, near the toll booth you skipped around.