Wonderful stay. Easy check-in, clean, comfortable, wonderful host, perfectly located, and the balcony was amazing! Made it difficult to want to leave the apartment. I was able to sleep really well, enjoy mornings looking at the view, and relax at the end of a day of sightseeing. I loved hearing the church bells throughout the day.
I think the only thing I could suggest to other travelers is to be conscious of wearing shoes indoors when in apartments... your neighbors below can hear you. (I had some heavy footed guests staying upstairs)
Book this place for your stay in Porto! You will love it!!