This place was great. It was incredibly central, had a nice view, had a big kitchen, and was really attractive (big windows.) They also had an espresso machine and packets as well as a decanter of port waiting for us for our enjoyment. I don't think its actually someone's home and more likely the building is owned by someone who air-bnbs all the apartments as a source of income. Regardless it was absolutely lovely and clean and run like a hotel.
On our way out we had an issue where our train out of porto was much later than our checkout time and the women there were absolutely lovely and let us keep our bags in the storage area and pick them um right before we headed off.
All in all i would highly recommend this as a lovely and central place to stay.