It's a great apartment located 5 minutes max from the João de Deus Metro station. From there, it's an easy 10 minute ride across a Ponte Luis I into Porto and the historic\fun center. Lisa was the person I spoke with most and she was very responsive. They even got the apartment ready with only 2 hours notice.
The only downside was that there was a major issue with the door. When I locked it I couldn't unlock it to get in. Lisa however was quick to respond the two times that happened to me and came over to unlock the door. It was almost midnight the second time that happened. She also said she was going to fix the issue after I checked out the next day.
All in all, a good AirBnb experience despite the door issue (which they attended to without complaint). Definitely recommend.