The apartment is a great option if you are visiting Lisbon and need a cozy place. The location is in the city's old town, Alfama where you can go for a fado concert and visit the neighborhood.
I had a great stay during my time, and would pick it again anytime. Paulo is a wonderful person, and we had a great conversation during the airport pickup ride.
Highly recommend the apartment, I literally can't find anything negative to say about my experience.