If you are thinking of going to Porto, you should stay at this great apartment. Perfectly located on a pedestrian street with easy parking nearby, at walking distance from all the (many!) amenities of the city, the newly renovated comfortable apartment offers ample space (probably the largest bedroom in Porto!) and all the appliances and utensils you may need during your stay, besides a beautiful interior patio shadowed by a large avocado tree. This is not the best part, which is the host: Renato is not only the most welcoming person, but also a great connoisseur of Porto. He will provide you with many recommendations to enjoy the city. We followed most of his advices and had a great time in town. And, besides Portuguese, Renato speaks perfect English and Spanish (German in the way!).
And if you are thinking whether to make it to Porto at all, stop thinking and just go. This town offers a great combination of tradition/decadence and a modern vibe. Probably the greatest bang for the buck among major European cities, a delicious three courses meal with great local wine would cost twice as much in Barcelona and five times as much in London or Oslo (there, with wine from miles away).
On a side note: Renato told us where to go and what to do in our way back to Madrid, which made our trip back as enjoyable as our stay in the city.
Muito obrigado, Renato!