Stunning flat, managed properly by Carlos.
Carlos also provided very useful restaurant recommendations and was available to make reservations. He responded to my WhatsApp messages very quickly.
Our stay included a bottle of wine, water and soap and shampoo. The place was properly cleaned on arrival.
The flat is very conveniently located close to the Douro River which is the most picturesque part of Porto.
Only two minor complaints which keep this rental from perfection. The bed is mediocre and could use replacing. It's not horrible, but it's not great. The shower fixture is a bit awkward and could use replacing. No issues with drains or hot water.
If you can, I would recommend you try the restaurant under the flat called Mercadores Tavern. You will need a reservation.