Carlos was a fantastic host. When I arrived (even thought it was late at night), he welcomed my warmly, gave me a tourist map of Porto and sat down with me for about 45 minutes to explain the map and give me his personal view on the best sights to see and places to visit. He also suggested to me some great restaurant values. The location of his place is great - just far enough outside the main tourist areas to avoid the crowds and prices, but close enough to walk there in minutes. Also walking distance to a metro station. Carlos was friendly, helpful and always available by phone if I had a question or needed something.