We spent 3 weeks in the apartment and had a nice stay. It's confortable and is very well equipped. Wifi was good. Kitchen has all necessary appliances. And the large terrace is a great bonus.
If you love cooking and cook a lot, it might be difficult as the fuses blow whenever you turn on several appliances (burners, oven, etc). For simple cooking it's perfect.
Beach is a 2-min walk. But note that it is 40 minutes from Porto once you're at the tram station. You also need ot account for the 25 minutes to get there. So to the center of Porto it takes about 1h15 by transport and 45min by car in our experience.
Hosts were super reactive and friendly. All in all, would recommend!