We had quite mixed feelings about our stay, unfortunately.
The location
The view is amazing, that is true. Also, it was our mistake to book the stay on this side of the river when we wanted to experience Porto. The issue is that the apartment is right between 2 bridges, so expect 30-40 min walk to even just reach Porto side. The public transport is also not convenient for that, same for the car or a taxi as the embankment before the Luis bridge is pedestrian only, so cars have to climb the hill, drive around and come down again then cross the bridge. In the rush hour it could be quite a challenge.
There are many restaurants on that pedestrian embankment which is 10-15 min away on foot, but they are mainly new and touristy...
The neighborhood
We arrived quite late and it was dark. The streets are very narrow around the house. It was somewhat hard to find. The alley where the entrance is is squeezed between rows of houses and is a bit messy - there are a couple of cats running around and nobody seems to clean after them...also, the dog is living in the house across and it chewed a whole in the door to look into the street and likes to bark when people are passing by. So overall it is quite unsettling when you approach the house in the night, even though you know it is safe there.
The house
Is seems to be recently renovated and looks good. However, it is very humid on the floor below where the bathroom and the second bedroom are, so it smells of stale air and humidity... toilet paper in the bathroom feels a bit wet... the sink is somewhat clogged, so if you keep water on for 2 minutes it gets full and it takes another 5 for the water to drain.
You cannot sleep or even spend time in the downstairs bedroom, when people on the ground level already woke up or are not yet asleep. Every step they make feels like a hit of the hammer over your head when you are down below. Stairs to the upper bed are steep.
From the positives- all the arrangements were very easy and generally our experience in Porto was great. The area is actually good (except for the house entrance) and if you walk 10 min you reach the cable car and you can climb to the top of the hill, where you get absolutely amazing sunset views.