Luís’ place is great. He is a great host, especially for a first timer in the city, providing itineraries for many things to do within and outside the city. While not entirely centrally located, it is quiet, restaurants and markets are near, and a place that sells great pastel de Nata right next door. Luís’ place is located within a 10-12 min walk from 3 of the metro lines (red, blue, yellow), each will get you to downtown in 10 mins. It’s just a 10 min walk from the university institute. I’d definitely stay here again.