I have stayed in a lot of airbnb's all over the world and the Courtesy apartment was one of the very best. The communication with Ana before we arrived was excellent. She was there to meet us and show us around the apartment and give us Pasteis de Nata from the best bakery in Lisbon! She had a binder with excellent advice on where to eat and shop - each entry with a printout of a google map showing how long it takes to walk there! We really appreciated the elevator in the building since we were on the top floor. The apartment was just exquisite - beautifully decorated and with everything you might need. The terrace was perfect for breakfasts or just sitting out in the evening. We never needed to turn on the air-conditioning with the big french doors in every room. The neighborhood of Principe Real is very quiet and is filled with lovely buildings but it is easy to get to the rest of Lisbon. I highly recommend this apartment. It is a very special place that we will always remember.