João's apartment is in an excellent location one block behind Rua de Santa Catarina and within walking distance of most other places you are probably going to visit.
The apartment was clean and has just about everything you need for a comfortable stay. The bed was comfortable and the furniture etc mostly new. The balcony was great for a sunset view over the rooftops.
Sharon checked me in and was very helpful getting me oriented and making sure I had everything I needed. She supplied a good variety of breakfast items, bread, juice, milk, yoghurt, eggs, butter, jams and fruit and there was plenty of tea coffee and other essentials.
I would definitely recommend staying here if you're spending a few days in Porto.