Good option for the value and the location. This is a bedroom in bath in an old building, and we found it easy to get to a lot of the sites by walking. Our host was very communicative, and even responded to a message at 1am when guests above us were being too loud.
However, the floors were pretty dirty (potentially from construction across the street), and the floor boards creaked wherever we walked. Additionally, the WiFi did not work well in our room. We had to stand near the bedroom door for it to work properly. Overall, a very convenient option in the middle of Porto.