Carlos was very welcoming and friendly. He left us some coffee, tea, and oranges, and even checked in with us after a couple days to make sure everything was going well. The apartment was clean and was just as we expected from the photos. It is also pretty easy to get to/from the airport via metro. There were 4 of us, and it was big enough that we didn't feel cramped. The apartment is very well situated to explore the Alfama neighborhood, and other areas are also accessible by foot (Praça do Comércio, Castelo de S. Jorge, etc.). Despite the great location, the apartment is unfortunately very noisy. There is a bus stop right outside of the door, and you can hear people talking (or what seemed like constant yelling) starting pretty early in the morning. There are also some rowdy people who hang out in the military parking lot just in front of the building. You can hear cars all night, passing by on the main street, even with the windows closed. If it's hot out, you will definitely have to sleep with the windows open, so make sure to bring some ear plugs! The noise is really the only bad thing about the apartment, but unfortunately, it makes it really difficult to sleep well.