I stayed with Humberto for 10 weeks since I did an internship in Lisbon. The flat and the room is very nice. The kitchen has everything you need and a small supermarket is also nearby. Humberto is a very nice person and tries to make your stay as good as possible!
The location is a bit north from the next metro station and city center, but close to the airport and campo grande.
Overall, I’ll definitely come back.