We had a great time in Porto and in Nelson's apartment!
Since we arrived really late, Nelson even picked us up at the metro station. He also gave us advice on how to get to the city from the airport. So we did not have to find our way on our own which was very helpful.
The apartment was nice and clean and looked just like in the pictures. The area was quiet and about 20 minutes away from the city center. We really liked it and would definetely come again! :)