Mario have a wonderful airbnb! The flat is big, modern, clean and super well located. It is in the city center and it has a metro station 2 minutes away (line direct to airport)
You can go everywhere by walking.
Mario was also very good, he helped us a lot. Him and Alex answered all our questions in a very short way.
They gave us all the facilities for the luggages.
We really recommend you to stay in this airbnb! If we go to Oporto again, we will stay there again for sure!