We really enjoyed our visit at Joana's place. The location was great, it was one street away from the riverfront and was surrounded by many restaurants and wine cellars. The walk to Porto was about 30 minutes (as this place is located in Gaia) and it was about 20 minute car ride from the airport.
Joana herself was a great host. She provided many details about places to see when we were there and gave us many tips about how to get around in the city. When sending her a message on the app, she would respond back within a couple minutes.
Would recommend this place to anyone visiting Porto!