Location is great and we had a great / very easy check in, as well as very easy communication w the hosts throughout the trip.
To be clear, you are not renting the home of a couple. This is clearly an appt that is used for airbnb and managed by a company. Walls are bare (there used to be art but it's clearly been removed), and rather dirty (especially around the head of the beds and sofa). The appt itself has been cleaned properly so sheets and towels, etc are in perfect condition - it's more the appt itself that clearly needs a proper scrub-down.
Would recommend for young coming to barcelona to go out, who don't plan to spend much time in the appt and don't mind some street noise. If you are looking for a family vacation and cooking dinners / spending time at home, I would not chose this place.