Mariana was one of the best hosts we ever had in Airbnb. We arrived at midnight and she had took the time to buy us some snacks, because everything was closed. She provided us with a booklet with great sightseeing and restaurant tips. She also treated us with port wine. The apartment was sparkling clean, with everything we could want. The street below was a little loud, but nothing too troubling. We definitely wont have to look for another place if we ever go back to Porto.