The apartment was true to the photos, more like a hotel room than an apartment. We were looking for apartments in the first place so it was not exactly the place for us. That said, if you are looking for a place which is conveniently located and clean, Barcelona Fifteen is a pleasant choice.
The staff (not the host) handling check-in was very helpful. The place does not have a reception but you can text their staff to get help. The air con was an issue in the first few days but once we asked for help it was fixed the next day.
One strange thing about the neighborhood but not the apartment itself, is that there are constant metal banging sounds from somewhere nearby, in frequent intervals, throughout the day and night. Quite disturbing I would say.