Mario's place was great for our short stay in Porto since it is located in the city centre. He gave us all the information we needed and answered our questions very quickly, even though he doesn't live in the apartment himself. The whole apartment (5 guest rooms, 2 bathrooms, big living room, kitchen & terrace) and our room were clean and had everything we needed. Mario made us feel welcome and gave us a good introduction to the apartment & the city - he even has his own app for exploring the city easily! We can definitely recommend staying at his apartment.