António's flat is located in Lisbon's old Alfama district, which is a little discovery tour on its own with all the little streets. Some of them are pretty steep, but you'll definitely build up some conditions after a couple of days of walking Lisbon. ;) Public transport is also just minutes away.
The flat is on the third floor with steep stairs, but completely doable to climb. It has an amazing view over Lisbon and the Tagus river and a super comfy hammock. Even though it's on the third floor, there is always in a nice breeze in the apartment with the windows open.
We enjoyed our stay here a lot. António was the perfect host, he (and his son) helped us carry our luggage upstairs, he gave us lots of recommendations on things to see and do in and around Lisbon and communicating with him was very easy. Would definitely recommend this place to anyone visiting Lisbon!