We stayed for six nights in Carlos‘ apartment and enjoyed the perfect location every day ! It is close to everything ( restaurants, shopping, places of interest, public transport ), so you can reach any place by feet.
Carlos also provided a transport from the airport which was a highly appreciated extra and worked perfectly for us. Also an early check-in was made possible. The metro station Bolhao is just around the corner and you may also take the direct train from the airport which takes about 35 minutes.
The apartment was brand new and perfectly clean and offered everything we expected. If you plan to cook be aware that (due to the new apartment) there are no accessories like salt, oil, coffee filters yet, but in Porto you are provided with so many good restaurants that you better go out and taste the lovely food !
Wifi works perfectly and even though the apartment is located in a busy street you will hear nothing because it is situated to a quiet atrium.
We would recommend to stay at Carlos apartment and say thank you to this perfect host that always responded immediately !