We had an excellent stay in Alexandres apartment in Alfama and I would recommend his place as a perfect gateway to visit Lisbon.
The flat is convinently located in the heart of Alfama and has numerous supermarkets, restaurants and bars in the vicinity. Most major attractions can easily be reached on foot.
The apartment itself has everything you need to make your stay as pleasant as possible, everything was clean and the decoration is really beautiful.
Alexandre himself was a good host and gave us numerous tips what to do and see.