We had a wonderful 2 week experience in this apartment. Julia, the agent/manager of this apartment, helped us book her place in the last minute book her place, and it really saved our stay in Barcelona. Everything is super comfortable, spacious and I can see how a family would have a great time here. The apartment is a local experience, set in a residential area which is very safe and quiet, but a few metro stops away from the touristic mess. We came to be actually in Gracia, and discovered the peaceful and more interesting local life near this listing. Julia also allowed us to check out later than mentioned which was very helpful to us.
This experience could be perfect, however, there were some minor issues:

1. Julia asked us to pay cash for local tax on arrival without mentioning it in the description before booking. We never pay cash when booking on Airbnb.

2. Shower in the main bathroom doesn't have a door, and the shower head was faulty. Julia was not able to fix it, but promised that this will be fixed by the end of the year.

3. Neighbors from upstairs are a bit noisy. You can hear their baby and people walking from the ceiling. But that's part of the experience :)

4. Wi-Fi is not as fast as expected. 6 MBPS. Some bedrooms were too far to get a proper signal.