Antonio and Mariana are super hosts. Their place at Alfama is great: at the heart of the historic center of Lisboa, super close to bus/metro stops, yet at a quiet street. It is very convenient even to walk to the main tourist points of the city.
The flat itself is very clean, perfectly equipped (first time we can really cook at an Airbnb) and has everything you need for your stay.
Mariana and Antonio are very responsive and gave us quite useful advice and local recommendations, I would definitely recommend them as a host!