Great communication during the booming process, hassleless payment method. Punctual driver, clean black Mercedes and all necessary in car, WiFi, water and tissues.English and friendly speaking driver. 100% reliable.
Aerocity offers a shuttle service at a good price but what's the use if you can't find the contact person. We were told to look for a lady in a blue jacket at Gate 1, and it turned out (after a long search that the lady was sitting in a coffeeshop with another coat over her blue jacket. Not helpful. But once in the bus, the service was OK.
We arrived at T4. Walk to exit, follow sign for bus and get out. Walk thru pedestrian crossing and on the right you see a flat yellow pole. It stops there. Tickets on board. 5 €. Same ticket cost as Metro, but going to O'Donnell you don't need to change line as Metro. Madrid traffic is not easy, therefore if it's good for your destination - surely Cercanias is cheaper and mostly faster.