We had a wonderful stay at our Aposentus apartment. We didn't get exactly this one due to neccessary repairs but another cool and brand new one (www.airbnb.pt/rooms/39765582) right in the centre of Porto. Our host João gave us good tips for our journey which made it a perfect stay. The place was brand new renovated, perfectly clean and equipped with everything you need, including a bottle of water and Port Wine :-)
All thumbs up and again any time.