Sergio's apartment is a very pleasant place to stay in Porto. It's located in a charming small street, 10 min of a nice walk to the center. The balcony is great - you chill out after a long day spent on visiting Porto and it's pretty romantic too :-) The bed is comfortable and the rest of the furniture is just what you need for a few days stay. Contact with Sergio was very smooth and he made sure someone was waiting for us with the keys on our arrival and departure. I definitely recommend staying at Sergio's when you are in Porto.