This apartment was a wonderful stay. The location is close to two different train stations (~2 and ~5 minute walks) and tons of bus stops. It looked exactly like the photos and the space was the perfect size for all three of us adults.
We were given a room at the back of the building, where the windows opened to the courtyard. It was very quiet, and we got a nice breeze every night. We didn't pick a back room, but if given the option we would choose it again to avoid the street noise that I've seen other people mention. The small bedroom did have noise from the elevator and staircase, but nothing out of the ordinary for apartments.
The A/C units worked amazingly well and were almost silent. The apartment came equipped with everything (a big win for us was the kettle and coffee machine!). The grocery store is just steps across the street and has everything you may need to grab. Also, the beds and couch were some of the most comfortable that I've experienced in any AirBNB.
There are good restaurants and cafes around the apartment, but it is located a few blocks down from the main streets, which we enjoyed because it was quieter with traffic. To find a larger variety of restaurants, just take a quick walk, bus or train down to the Pg. de Gràcia or Rambla de Catalunya.
Pablo was quick to respond to messages, and we didn't have any issues during our stay. Check-in and check-out are done without contact and are simple.
I would definitely rebook here again if visiting Barcelona!