We spend 5 nights at Gisela's place and it was great. Exactly what we were looking for. Very clean and with thoughtful details, quiet but nearby the riverbank with a wonderful view over the lower part (and most beautiful part) of Porto. Unfortunately we didn't meet Gisela in person but everything was well arranged so we can enter and go out the apartment without any problems. Nevertheless, she was available via phone/mail in case we needed to contact her. I undoubtedly and strongly recommend her place.