We had a great time in Porto thanks to suggestions from Carlos!
Upon getting the apt. he offers many places to see, includes a map with a route worth see in the city.
Carlos is very kind and provides excellent service.
He occasionally sent current events worth visiting (biggest fair of the country or best places to have a brunch).
The apartment is way enough for two-three person and well equipped considering you stay for a week or so. It is also well located having some good restaurants, shops, monuments nearby. Just a few minutes away from the Metro station to the airport.
Definiately recommended!
Thank you, Carlos!