Mario is a fantastic host, I haven't seen him but I felt he was always there if I needed something, answering immediately. We enjoyed a lot our stay. His map made by him gives you an idea what to see and what to do in a funny way. The house/room was very clean. The location for us was just amazing.. You are walking distance of some main attractions like bolhao market, cafe majestic, Lello library, Sao Bento train station and many others. In front of you are staying you have the metro station, from there you can go anywhere further plus a street full of shops where no cars passing by. I will definitely stay there again!