Place matches the posted pictures, it is very clean and in a good shape. Bathroom has a good walk-in shower, everything is properly maintained and cleaned.
Kitchen had everything we needed to cook some meals for the two of us and a child.
Host is friendly and helpful, he met us by the apartment, showed around and also gave some recommendations what to see in the city. It was very easy to communicate with the host, whenever we had a problem we could write to him and he would come come and help us. He also gave us a high-chair and a crib for the baby.
Location is very close to the ocean (~5 min walk) and there are several bakeries, restaurants and grocery stores around.
Traveling to Porto center was easy, because metro station is also very close.
Largest park in the area is quiet near, if you're traveling with a child, it's a good place for long walks.
There were a couple of minor inconveniences, such as, the front door of the building has a lock that sometimes is difficult to open. Also doors to the bedroom can't be closed quietly, because the handle is squeaking, that could be an issue if your child is a light-sleeper. Also neighbors are a bit loud (during daytime and evening, but night is very silent), but that is quiet common across the whole Portugal. Also, note there are stairs to reach the first floor which has elevators, you need to take that into account if you're traveling with a stroller. It wasn't much of a problem for us, but you can't drive up till the elevator, you will have to carry it a few steps.
Overall it is a very good place to stay, the location was excellent, we could reach everything we needed in a couple of minutes, the host was helpful and the place was in a good condition.