We stayed at Marco's place for 3 nights. We were met by his family members and they gave us plenty of recommendations for exploring Porto. The apartment itself has a lot of old world charm and is very spacious. Firm bed and well equipped kitchen. Because it's in an old building, there is no central heating. The flat had a couple plug-in space heaters which helped, but we had to close off certain rooms to keep the heat in. Overall, this was a great value flat and I would recommend for short stays.