Mario was really fast in answering our questions and it was really good for us that the door can opened by code so check-in is everytime possible. He organized a taxi to airport for us at 4am and was really kind at all. Room Number 1 was perfect, clean and the two bathrooms were totally enough for the different people in the flat. The flat is really central, maybe a little loud but yeah - it is a flat in the middle of the city thats normal. The App of Mario is perfect to discover the city and we had a really good time there. Thanks a lot Mario, hope we can come to porto soon!!