I'm thinking of renting from National. We have rented from Avis in the past and had EXCEPTIONAL service and the cars were great and getting the car and returning the car were both very easy...but National comes out a lot cheaper this time...so, please let me know what kind of experience you have had with them....and can you confirm that the cars are at the airport...(i.e. no shuttle to get to them) WIth Avis the cars were easy to walk to and there was no problems...will it be the same with National?