Paulo's apartment is really big, nice and clean! It has 3 sleeping rooms with queen size beds, 2 bathrooms, 1 big living room, a separate kitchen, all pretty new and really well maintained. Excellent mattresses/pillows! Paulo himself was very helpful and responding in online communication (I didn't meet him in person).
We loved staying there (4 people) and would do it once more if we come to Porto again.
One small remark - the window frames are not sound proven and that might be a problem for people with light sleep in the rooms facing the street, but that's really negligible compared to all the positives!