The apartment is in one of the best locations in the city. It's right above 3 of my favorite restaurants in Porto and overlooks a square with lots of local shops. The apartment itself was clean and spacious. Our check-in was quick and our host was friendly.
The building security seemed a bit over-the-top. There is a keypad entry to enter, another one to open the elevator, another keypad entry to operate the elevator, and finally, a door key for the apartment.