David's apartment is located perfectly in the old town where you get easy access to various spots and public transportation. It's location so great that we can returned to it in the late afternoon when the sun is too strong and weather is too hot, and then went out again once outside cooled down. The neighborhood environment is quite in the night so we had no problem in sleep.
David welcomed us in person and is very helpful in giving us tips and recommendations about where to go, where to eat, where *not* to eat. We even went to one of the recommended restaurants twice, and another bakery for breakfast 3 times!
The facilities in the apartment are just as good as you would need, especially the laundary machine installed in the kitchen of David's apartment, which means for exclusive use, is not something you can easily find in other properties on Airbnb. It helped us very much in our second half of a long trip. When showing, hot water sometimes became cold and needed a few seconds to get recovered. In the winter this could become an issue, so hopefully it can be improved soon.
We'd definitely want to stay here gain if we have a second time Porto trip!