The apartment is a great place to work away from home. It has a lot of light and air, and the bedroom is cosy and comfortable. Internet is fantastic - we had no problems at all with it over the two weeks that we (2 people) were working from it quite intensively.
The kitchen has plenty equipment, and the coffee machine is a treat.
Walking distance to a lot of more commonly visited areas of Porto, and Ubers are cheap and easily available.
We really enjoyed our stay at the apartment, and Humberto, our host, took care of us very well!