The Airbnb is located in the heart of Alfama and is a very suitable base for any exploration of Lisbon as many things can be reached on foot.
It is very close to the river and to many restaurants and bars. Also, it is nice just hanging out in the street where the Airbnb is located and enjoying the sun after a day in the city.
My stay lasted for more than a month in the winter months (Januar-Feb), which was a little bit chillier than expected at the beginning. However, the place has a heater and Ana is happy to provide an additional one if necessary. The apartment is nice and contains a small but functional kitchen. For longer stays (> 3-4 weeks) it might be worth mentioning that the building is old and hence has lower audio isolation. Short stays will be not really affected by it and the evenings are quiet.
Ana is a really nice and caring host which I can only recommend.