It was a pleasure for us to stay in Daria&Xavis apartement. We were five girls together and stayed for 5 days. Although we arrived late in the night (around 23:00), Daria welcomed us in her flat very warmly. It was perfectly clean and prepared for all of us (enough towels, cooled water in fridge, all beds with clean lining). We felt very comfotably in the flat, it is spaciouse enough. The flat is furnished in Ikea style and it makes nice fresh impression.
Location is really great, just a corner from Sagrada Familia, very near to underground station. There are planty restauarants, tapas bars, shops and bakeries around.
Althougt in the city center this flat will offer you a nice and quite rest during your stay in wonderful Barcelona. I really recommend it.
Communication with Daria was excellent she answered us always quickly.