As for the place itself, it is really a perfect location. Many attractions are within walking distance, and if something is too far away to reach by walking, then you have the metro station right outside your building!
The place is spotless and well-maintained. The bed is big and very comfortable. There is a lot of room, so it is perfect for 2 2 people, but it could easily hold more!
The bathroom is gorgeous and spacious.
The kitchen is also well equipped and allows us to cook our own food without issues.
As for the owner, Raquel was just excellent! We were greeted by her at the door when we arrived. She showed us everything in the house and helped with any questions. We even got a list of great restaurants and "must see" attractions in the area! She was also always available via phone in case we needed anything.
Overall, I can't recommend the place enough, and if I'm ever back in Porto, this will definitely be my first choice!