Flex was very helpful and provided a lot of information and advice.
The Airbnb is in a very good location. Only 2 min walk to Sagrada familia and from where it may take about 30 min to many tourist spots nearby. It's inside a small relatively quiet alley but unfortunately there were some renovation nearby during our stay.
It's a pity we came across the heat wave and there is no window on the main bed room so it was quite uncomfortable for our friends staying in that room.