Cons:The Europcar agent at Athens airport informed me upon arrival that as of a few months ago they no longer honor a US driver's license, and refused to rent me the vehicle I had reserved. This was never mentioned when I had made the reservation. To rectify the situation, I then suggested changing the driver on the reservation to another family member with whom I was traveling who had a driver's license from another country, one that they did honor. The Europecar agent however refused this as well, insisting that they are unable to modify reservations, nor make new ones at that facility. They insisted that I had to do this through Europcar's reservation call center, which is only open during limited business hours (this was after midnight on a Saturday). We had to make our way to our hotel 30km away by other means, and made a call to Europcar's reservation line when they opened the next morning. On the call, they informed us that the vehicle in question was no longer available, nor any other vehicle for our time frame. They also confirmed that what their agent at the airport told me about not being able to modify or make new reservations at that facility, was untrue. They could have, and should have. The Europcar agent at the airport simply got her jollies by screwing over an American, which came through loud and clear in her demeanor. The Europcar agent at their reservation call center wasn't quite as rude, but was still entirely unhelpful, took no responsibility on behalf of Europcar, and was unwilling to make any effort to rectify the situation. Europcar simply left us high and dry. We were lucky to be able to find another suitable vehicle for our trip with a local no-name company, but had to waste half a day tracking one down, as this was peak season and all the mainstream rental companies as well as most of the obscure local ones were fully booked. Europcar never again.