This is a lovely little place for one or two people. It is located on the northern edge of the old quarter, not touristy, and frequented by young people who actually live in the area. The old quarter and river are within easy walking distance. The area is filled with many interesting shops, restaurants and coffee bars/bars, and has a very relaxed feel.
The apartment, itself, is as advertised. It was spotlessly clean, and seems to have a reasonably well equipped kitchen. All the appliances seemed first rate. I say 'seem' because I tended to eat only breakfast in the apartment, and so did not have an extensive cooking experience there. The bathroom was convenient, and the bathroom fixtures were very nice and modern. It is on a quiet street, and virtually no noise once in the apartment. It is on the (European) first floor and there is an elevator from the lobby.
The patio is delightful and perfect for any of general lounging, sunny breakfast or evening dinner/relaxation. It gives the place a very relaxed, tranquil 'escape' feeling.
Nuno, Emma and those they work with were very responsive and helpful with any questions that I had. They were clearly doing their best to make my stay as enjoyable as possible.
All in all, this apartment contributed a lot to the enjoyment of my stay in Porto.