The apartment can easily fit up to 4 or 5 people and still have a lot of space to place your luggages . We cooked, we have used the dishwasher and you can find everything you may need to prepare yourself some meals.
The cleaning is the best one I have found since I have been using Airbnb and Maria was always very friendly and ready to suggest us restaurants or museums to visit.
The location is perfect, very close to the metro and to the bus stop, we were in Porto for Nos Primavera Sound and it was pretty easy to get there even by taxi, you can also walk to the city centre and it will take you about 30mins.
I raccomand you to choose Maria's flat to enjoy Porto's life.