Do not use this service. They have a ridiculous policy. You pay and they give you a booklet with a bar code on the cover that the driver scans. It's just like the booklet with ads and coupons the Luxor gave us and the one I picked up on the monorail. I left it one morning on the bed and the maid must have picked it up with the bedding because it was gone when we went back to the room. Now they made is pay another $7 to get to the airport even though we have the receipt to prove we paid for two round trip tickets. What a rip off! What a scam! (are the maids in cahoots with this stupid shuttle service?).