We've stayed in a few AirBnBs in Lisbon and this one was the best to date. All of them were stylish but we had the best sleep here because it has efficient air-conditioning and is on a quiet, residential street (in the heart of the city this is not always a given - Lisbon can be party central!). Also the terrace is a really wonderful space, either for breakfast or relaxing after a day's sightseeing. There is a mini-supermarket just around the corner which stocks pretty much everything you might need during a short break.
The spiral staircase from the lower floor to the second bedroom and terrace might not suit some people with knee trouble or walking difficulties.