We loved our stay at Raul's flat and would highly recommend it to anyone. The location is great and within walking distance of anywhere within Porto, there's nearby restaurants, cafes, and bars, the roof terrace was fantastic to enjoy both during the day and for the sunset, the flat was clean, check-in was simple, and Raul himself was very friendly, extremely helpful, and very good with communication. He definitely went over and above to make our stay relaxing and enjoyable.
There were two things that we feel we should point out in case they bother other people, which was that the flat wasn't very soundproof at night/early mornings and also there wasn't enough hot water to take long showers/two showers in a row. Neither of these things bothered us too much, but they're points that others might want to know.
We loved our stay here, would highly recommend it to others, and would definitely to stay again in the future!