We enjoyed our stay at Helena and Artur's place. Although we didn't meet them, they were very accommodating to us checking in early and holding on to our bags on the last day. Katja ( I think) was delightful. She meet us at check-in, showed us around the apartment and gave us some helpful advice about Porto. The apartment was perfectly clean and tidy and more spacious than we expected. The kitchen was well equipped. We found the bed quite firm and uncomfortable, but this might suit some people, but it was a bit difficult for us to sleep on. The apartment was very quiet and in a perfect location - with easy access to train stations, attractions, river and 2 supermarkets. There was also of plenty of great cafes, restaurant's and bars nearby (< 2-3 Min walk). Everything was great except the WiFi. This is really our only negative criticism. We had difficulty connecting and then staying connected. The signal was low and was dropped frequently. We we're not trying to stream netflix or anything, just browse the internet.