I enjoyed my stay in Hildebrando's flat. I was able to check-in earlier and everyone was extremely helpful. I was even asked after 3 days if I need clean towels (which is great) and because it was cold and rainy, I even had an additional duvet. The flat has an interesting layout and it is easy to walk into town and everywhere else. The metro station (Trindade) is right around the corner. I can recommend this flat if you are ever in Porto.