We had a great stay here!
The location is amazing, very central and on a main square with lots of cafes, restaurants and things to see within a 3 minute walk, and easy to get to from the airport.
Our hosts were very helpful, welcoming us with lots of recommendations and coming to our aid very quickly when we had an issue with the lock on the front door during our stay.
The flat is also very stylish and comfortable.
We didn't realise from the pictures that the second bedroom doesn't have a window to the outside. Instead it has two inner "windows" with sections of the wall on hinges leading to the hall and the living room, to allow natural light to enter that way.
All in all a great place to stay and enjoy Porto!