I dealt with Anna and she was great. Very helpful, easy to reach and quick to respond to any questions. The apartment is lovely, well laid out and spacious. The dining area that overlooks Las Ramblas is a fantastic place to sit and enjoy the city. The location of this place is amazing, right in the center of the city. You can walk to pretty much all the notable sites (e.g., Plaça de Catalunya, the cathedral) with 15 mins. There is also a large market less than 5 mins away for water, snacks, etc.
Being in the heart of the city comes with a trade off though. You hear everything that is going on outside.. inebriated shouting, delivery trucks and construction in the early hours of the morning . Bring earplugs if you are a light sleeper or just plan on staying up or out late. :)