This is one of the best Airbnbs that I have stayed in! First, the apartment is absolutely clean. It is decorated nicely, but is not overbearing. She has tons of books, magazines, and puzzles. The terrace is the best. It is huge and a wonderful place to have some beers or a glass of wine. There are cats that like to hang out on the terrace, but the space is really cool with tons of seating. There is a full kitchen and it is really nice to have a fridge.
The apartment is a short walk to the center of town. There are a bunch of great restaurants really close by and a large supermarket. However, the neighborhood is really quiet and you can even open the window at night but still sleep easily.
Lastly, the hosts were so thoughtful, attentive and kind.
You must book this when staying in Porto! You won't regret it!