The place is very spacious and nice. Almost everything you need is available in the apartment.
Unfortunately, the check in didn't go as planned. Due to the communication beforehand we had to wait an hour before someone of the Porto concierge came to give us the key. So make sure you confirm your time of arrival and you receive a confirmation in return.
The apartment is located in a quiet neighbourhood. About 20/25 minutes walking to the old centre.
Google maps doesn't recognise the street number. (We walked up and down the street for 25 minutes, because we couldn't find it)