We had a fantastic 4 night stay at Matthieu's great apartment. We are a family of 4 (with 2 teenagers) and it was just right for us. The living area was particularly spacious and nice to relax in after a full day of sightseeing. The location was also perfect for us. The area was very vibrant and while you could hear the noise from the street in the living area, the bedrooms were quiet as they were set back a bit.
Adriana welcomed us when we first arrived and gave us some helpful information about the apartment and also booked us a taxi to the airport for the end of our stay. We loved the apartment and I wouldn't hesitate in recommending it as a great place to stay in Barcelona.