A very-well situated appartment, in a hype and very central area of Porto. Unfortunately, we did not meet Mario but he indicated how to enter the flat and responded quickly whenever we sent him a message. The apartment is like in the photos, with the little downsides of old buildings, but is is on the whole pleasant and a very good choice for a budget accomodation. There are several nice bars and restaurants just down the apartment in the street, which gets very lively at night, but thanks to the double lazing, the apartment is relatively quiet. Also, Mario offers a very good smartphone application that he created himself and gives excellent tips, as well as vouchers to have breakfast in the old town, a ten minute walk away. We had a great stay and I will not hesitate to come again.