We had a red time here!
The location is in our view just perfect for a trip to Porto. On the south bank of the river you can easily reach the old town of Porto by foot (over the famous bridge) and you have a great view from the terrace and the restaurants just outside of the apartment.
It was clean and nicely equipped, the terrace is wonderful (yes you can hear the ventilation pf the nearby restaurant; but this is nearly unavoidable in Porto/Lisbon if you are in the centre).