We had a wonderful stay in the Astern appartment. The appartment is very nice designed and comfortable. Marco is very hospitable and helpful. The river, main boulevard, restaurants, sights, bus line 500 (which brings you to the coast or up the hill), taxi spot, etc is all within 1 minute walking distance. The appartment faces a quiet street. There is some noise at night, but we found this acceptable at such a location in the city centre. We recommend this place to all visitors of beautyful Porto!