The apartment is very much like in the pictures and is lovely for any length of stay. I found the studio room very useful for creating my own office.
The balcony by the bedroom has a lovely view of Tibidabo and the W Hotel. It was a nice place where to read after dinner.
The area around is served with anything you can think of, and is one of the most beautiful in Barcelona (in my view). Also more local people around and less tourists. Yet you are 15 mins walk from Plaza Catalonia. Go for it!