We were a group of 5 adults and 1 toddler staying at Alex's AirBNB for 4 nights. The apartment was very large and spacious, even for our larger group. The apartment is very clean and offers a great view from the living room. The location is superb and the bed linens were very comfortable. While the bathroom is a little small it still worked for us. The fireplace was a huge plus, especially since it was rather cold during our time in Porto (and it also helped to dry our clothes). While the apartment and location was quiet overall, I would recommend bringing earplugs if you are a light sleeper and are staying during a rainy month. We unfortunately had some torrential downpours while we were there and were woken up by the hard rains hitting the skylights in each room.
Communication with Alex was great before and during our stay. He was also very accommodating to our needs, especially when my brother and his family arrived earlier than us; Alex was very flexible and showed up to check-in to the AirBNB with my brother instead.
We thoroughly enjoyed our stay here and would highly recommend Alex's place if you are staying in Porto!