Hi all, great site with great info. I've been reading the posts about the Aerocity shuttle from Barajas and I'm a little confused. I booked a shuttle service on www.madrid-airport-shuttle.com for my trip next month, and I see on the voucher that the service will be provided by Aerocity. The site asked for a credit card and says it charged 26 Euros for two people from Barajas to the Plaza Mayor Hotel . The question I have is that many posters have said that Aerocity does not take credit cards and that the card is only to hold the reservation. Does that mean I'll have to pay at the time of service? Or has their policy changed? Or is this pre-paid (perhaps with a surcharge?) through www.madrid-airport-shuttle.com ? Any clarification anyone could give would be appreciated.