You cannot find a more value for money place in Porto if you're looking for a cozy apartment right in the city center close to all points of interest. The location is amazing. The street on which the apartment is located is a little shady but nothing to worry about. The apartment is modern and equipped with some unique games and pots & pans for cooking. The linen and furniture are very clean and the apartment is well maintained.
From the balcony on one side you can see the Sao Bento station and on the other side the Porto Cathedral.
Would totally recommend staying here !