I strongly recommend Diogo and Christiana's flat for couples or solo travellers who come to Porto. It is very well connected to public transport and you can walk to the city center in 10 mins, passing some very charming streets on you way. The room is spacious, flooded by daylight and you can enjoy a nice coffee in the morning on the balcony facing a beautiful garden. The bed is very large and comfortable, we did not hear any noise from the street. The self check-in was smooth and communication with Diogo always fast and pleasant. You will find equipment to cook a simple meal, like pasta and there are some very good places to have breakfast on the same street. We would always stay here again.