I stayed a week at Matteo’s apartment and was really comfortable. The apartment itself is equipped with everything you need for a long or short stay and location to both city center and old town (like Alfama) is easy walking distance.
Comfortable beds, great water pressure in shower and lots of natural light in the apartment.
Communication with Matteo both before and during checkin was superb and he was very kind in sharing recommendations and making sure you had everything you needed for a good stay.
My only point to make for those who are light sleepers is that the apartment is located on a street with shops in front where people can get loud.
Besides that I would definitely recommend Matteo’s apartment to those visiting Lisbon :-)