Other than tricky key locks, which we did eventually figure out, we loved our stay!
Very spacious, very comfortable, very clean. We did not want to be in the busy, old part of Porto and this was perfect! Dirt cheap to Uber to the port action, and if you are up for longer walks, you can do that, too. We loved that we had a supermarket, a pharmacy, the most amazing pastry (and cheeses and sausage) shop, and 2 incredible evening restaurants within a 5-10 minute stroll from the airbnb.
Our host spent a good hour with us upon arrival, going over the apartment, but more importantly providing us with an awesome map in which he indicated all sorts of things to see and do. If we needed to ask a question afterwards, Miguel responded immediately through the Airbnb app inbox.