Arrived at Onestop parking at DIA 2 1/2 hours before international flight. Made a reservation there a week previous. Showed parking attendent reservation and she just kept saying we couldn't park there because they were full. Fearfull of missing our flight, we sought parking elsewhere and had to pay a premium price $200.00 more. One stop refunded our original fee, but would not pay for the damage they caused. It was a bit like the Seinfeld where they had the reservation for the car but not the car EXCEPT IT WASN'T FUNNY! It was very stresfull and expensive! AVOID ONESTOP PARKING!!! I will be looking at small claims court.