Well located Airbnb. The studio itself is situated on a street with plenty of little cafes and shopping, walking distance to the historic district and plenty of other Porto neighborhoods and sites. Easy access to the Metro as well - the closest station was about 10-12 minutes walk.
The studio was cozy and perfect for the two of us. Nicely decorated, clean, sufficient kitchen set up for light cooking, and overall comfortable use of space. We were only here for a couple of days but I think we would have been just as comfortable for a week (or more!). There was some street noise depending on the time of night with people walking by. Minimal car traffic though, as the road was mostly closed off to vehicles (maybe the occasional car and/or moped zooming through).
We never met Marco or Carla but they were super easy to communicate with and the self check-in/out process was a breeze. Definitely think this place is a great stay for anybody looking to stay in Porto! We'd stay here again :)