The flat in Porto was the best flat I've stayed so far on Airbnb. It was clean, bright, spacious. It has all you need for a longer (like couple of weeks longer) stay. We stayed during November, so heating was wery welcomed. Flat has two bedrooms and two bathrooms. Sleeping part is separated from the living part which is great for daily leaving. Internet is fast so you can easily work remotely from the flat as well. If you come with the car, you can park in the garage inside the building (trust me, you want to have a parking space in Porto, it's not so easy there) - just come with the smaller car or be very skilled in narrow parking spots :D
The location of the flat is fantastic. It's in a quiet neighborhood but only 10 minutes from the city center. You have many grocery shops and supermarkets and cafes and restaurants around.
To sum it up: it's a fantastic place to stay. Extremely comfortable to live with perfect localization.