I highly recommend Antonio's place. Centrally connected, few walks away from Metro (main-yellow line) and bus service to main attraction in Porto. He owned the whole building and there are 3 unit apartments for rent. I got the top-Unit C at the second floor where I could see the church dome from the bedroom and living room.
But on the top of that, Antonio is amazing host. I arrived late in the night and I could call and contact Antonio easily for a help. I've been traveling for almost 1,5 months now, changing and moving around from hotel to Airbnb. It can be alienating and unsettling after a while. Porto is my last city before I return to Indonesia. Thanks to Antonio, he made me feel home already.
My gratitude to your professional service and kindness.