Mario's apartment is absolutely lovely and exactly what was promised. Amazing view on the top floor overlooking the city of Porto, it was quite a nice surprise to walk in to after a long day of traveling. Very well-kept and Mario was extremely hospitable: left a nice bottle of porto wine as a welcome gift, allowed my to leave my baggage at the apartment for a day even after check-out (train wasn't until the evening), walked me through a detailed map of places to go upon my arrival, etc.

Would definitely stay here if I ever came back!