We had a wonderful stay at Gaspar's place and we'd gladly stay again in the future! Communication and check in were perfect. Lyza met us in person, explained everything, gave us a tour and tips. Gaspar has a very useful google map with places to eat / drink and things to do. They were very easy to reach and send us other tips and recommendations.
The apartment itself is perfectly located - everywhere you need to go is essentially a 10-15 minute walk. There are plenty of restaurants / places to eat within a 5 minute walk, and the neighborhood is lively and vibrant while the apartment itself is quiet and doesn't get any of the street noise.
We have stayed in many different airbnbs over the past five years, we host ourselves, and Gaspar and Lyza are some of the best hosts we've had! Don't hesitate to stay with Gaspar next time you are in O Porto!