I did an Eurotrip with my family and Barcelona was one of my last stops and honestly my family and I were very disappointed with this Airbnb.
The apartment overall was incredibly dirty. The rugs were not only stained but dirty. The mattress from the sofa bed was dirty. It had a big black stain, like if something spilled (God knows what). On the other hand, the floor was not clean at all and walls were also dirty.
This was the only Airbnb that did not offer the basic to cook (oil, salt, sugar). The apartment had a coffee maker but no coffee capsules. I am sure this is not a requirement but if you claim to be a luxurious place to stay, you must take care of those little details that make a difference.
On the other hand, the apartment had an amazing location and overall has the potential to be a really nice place to stay. There are supermarkets, restaurants and bakeries close to the apartment. The subway station is right across the corner and you are close to several touristic attractions.