The apartment is charmingly restored, well equipped with everything new and fresh looking. It's a good place to stay with a family, with one airy and functional kitchen to share meals in (you might wonder why bother with so many dining options in Barcelona but we have 2 young children who sometimes got to tired by the end of the day). The little terrace is a nice touch too.
The landlady was super responsive, checking by text that everything was fine after we arrived and the local agent who handed us the key was friendly and efficient (we called him when evening because there was no more hot water and he popped in the next morning to fix it).
There is a little supermarket 2 minutes away to stock up on groceries if needed and local shops/ cafes/ restaurants around. The location is convenient to walk to Passeig de Gracia for example, but you will need to take the underground to the Old city or the beaches. That being said, it is fairly central and we never needed more than 30 minutes to reach any destination.
The only thing I would say is that the flat is on the first floor of a building at the corner of 2 streets so you will hear traffic and noises from the street in the bedrooms (which are situated at the front). This did not bother me but light sleepers should be aware or bring earplugs.
Overall, a very nice first experience with Airbnb and we would happily stay again here.