Rui Pedro was a great host; he met us in person, showed us around each room in the apartment and gave very concrete instructions and explanations. Additionally, he gave us some great local food recommendations for the neighborhood and explained how to get around Porto with a map he provided.
The apartment is spacious, airy, and very well-equipped. There were plenty of extra sheets, towels, and pillows. The street is very nice and quiet and has an excellent cafe for breakfast and drinks a few doors down from the apartment. Overall, it was a short 10 minute walk to the major shopping street of Santa Catarina and other major sights. Also, the metro stop at Agosto 24 Plaza is truly a 2 minute walk and made for a very easy transfer from the airport. Campahna train station is a 10-15 minute walk, though it is partly uphill, so uber/cab might make a better option.
Overall, a great stay and a very pleasant apartment and host.