Susel, Rafael's sister, is wonderful and welcomed us perfectly. She was flexible with our late arrival, showed us the flat and gave good advice for visiting Porto. We communicated with her and Rafael very easily, they are always willing to help.
There is also nothing to say about the flat: clean, design, well located. It is as the pictures show and I think it is a true 5-star-hotel equivalent with Airbnb prices.
For both points we enjoyed our first trip to Portugal and would definitely book again when we come back to Porto. Muito obrigado Susel and Rafael!