I stayed at Maria's place in the lovely Alcântara neighborhood in Lisbon for a month while I was there for research the summer of 2017. The apartment is well-furnished and comfortable and Maria is a wonderful host who gave me a very warm welcome for my first day. There are several grocery stores and restaurants in the area and her apartment is a short bus ride away from Belém, walking distance to the docks and LX Factory, and has easy access to other areas of the city. Overall, I would recommend her place for both short term and longterm stays.
Tip: Make sure you familiarize yourself with ALL of the bus lines in the area as the closest one tends to have a rather unpredictable schedule and stops running around 9:30 on weekdays. The good thing, though, is that there are plenty of buses within a few blocks from the apartment.