We had some difficulty getting from Lisbon to Porto and Ermelinda and Ricardo were very flexible in allowing for our floating timeline.
When we arrived we thought maybe they had made a mistake - this Airbnb looks more like a 4-star hotel than an apartment. It overlooks a square with a fountain in it. There's an incredible church next door and a ton of restaurants nearby. The more heralded downtown options are only a short cab ride away or a 20-30 minute walk depending on how distracted you get by Porto's charm along the way. They even have a binder with tips and some other luxuries ready for you upon arrival.
We spent the first morning with the windows open looking over the square and just reveling in the luxury of the space. There's enough room for a family of 4 or maybe even 5 if the kiddos are pretty small and there are at least two TV's and two bathrooms. We didn't even look in the extra bedroom since it was just me and my wife.
Basically, if you want a place to come and feel ultra comfortable after a long day of travelling - this is the place for you.