I stayed at Nuno's place for New Year's Eve with my family. We spent a good time there. The apartment is very clean and bright maybe a little cold but Nuno provided us with extra electric heater and extra blankets and it was just fine. The appartment is 15 minutes walking from the city center.
Nuno is a very good host, he and his family gave us all the information we needed. If I had to come back to Lisboa i would definitely come back to Nuno's place.