We had a very comfortable stay in Diogo's flat. He was very kind and accommodating of early check in after an overnight flight. The apartment is on one of the major shopping streets of Porto, but 15-20 minutes walking from the busy section. He offered many useful recommendations of restaurants in the neighborhood. Be aware that both bedrooms are up a spiral staircase with a ceiling that isn't full height at the top so it's necessary to duck as you come up or head towards the staircase to go to the first level. The noise of the elevator being called may bother people who are light sleepers but no one seemed to use it between 11-6. The kitchen is stocked with useful basics and the balcony is a lovely space with beautiful views of the city.