The place was perfect for what I needed: clean, central, big enough (I was alone, but it was good for 2).
Key elements: absolutely flexible check in and check out at NO ADDITIONAL COSTS; VITOR was the PERFECT HOST - I arrived at 1:10 am, he welcomed me with a big smile and spent 30 minutes describing Porto, the main points of interests and gave me very good tips that only a local can give, drawing everything on a map. And he answered to all my emails within 1 hour, always. Thank you Vitor!