Carlos was a great host, he was very respectful and gave me a lot of privacy. The apartment is very well located literally one block away from Rua Santa Catarina one of the main commercial streets in the city and within walking distance from the old port and the city center where all main attractions are located. There is no private bathroom at the apartment but that was not an issue at all as it was always available. I visited Porto at the beginning of the cold season and a couple of nights the room was quite cold (it didn't have a heater) but it was not a big issue. Just something to take into account if you're planning to visit during the winter. This is definitely a great option to stay at Porto specially for solo travelers.