Dino &Ines are very nice people, they prepared a homemade cake(very delicious) and a bottle of wine before we arrive. The apartment is the best I have ever met, beautiful, decorated with very decent furnitures and equipment, very modern and classic. The location of their apartment is very good as well, closed to 2 Metro station, 10 mins to São Bento station and city center, by walking, and also, there is a big supermarket called Froiz near the apartment. If you are Chinese, there is also a Chinese supermarket near the apartment.
Most importantly, Dino & Ines will give you very detailed tips about traveling in Porto, you will like here!