Our stay at Casa Formosa was very pleasant - the location is nice and comfortable, right in the city center, quite near station of São Bento, Avenida dos Aliados and market with much local food, there are also all kinds of bars, cafes and restaurants in a walking distance. At the same time the apartment is very quiet and cost, nothing disturbed us at night.
João is a great host, who welcomed us into the apartment, gave many recommendations about the city and where to go during day and at night.
He is very hospitable and willing to help - when in the evening we realized that we don't have a hair-fan and wrote to him, he was fast to respond and to provide us with even 2 kinds of fan :)
Thank you, João!
I would highly recommend the stay in this apartment to everyone coming to Porto.