A beautifully furnished, self contained apartment (no. 2). Luiz is a wonderfully warm and inviting host. I felt like I was staying with my parents (and they weren't there :D) The apartment is so close to the beach and the tram. Supermarkets and cafés/restaurants are nearby.
The only negatives, were the Wi-Fi was a little weak at times, and we ran out of hot water quickly. If you need help, he may not always be in the office, but he responds to emails promptly.
Overall, we really enjoyed our time in Porto and I would highly recommend Luiz' apartments.