Freekin' robbing French B'stards, Shuttle drivers that wanted to charge the return fare each way or a slow train and then an expensive taxi ride to the site, I see the MS are even listing a bus service, only it's running one service each way a day! Europcar recharged me for a pre-paid rental too last year "We'll just pit a hold on your credit card for the security deposit" BOOM receipt in the post for a rental charge that was more than the pre-paid price, fortunately the booking agent
rentalcars.com got that refunded. Just be sure you know what you have booked, what you are paying for and have the supporting paperwork printed off and with you.