Our big family fitted the Anna's apartment really well. The best part of it is the location - Gracia is beautiful district and the city center is easily accessible by foot or local transportation - and, of course, the terrace, where we had our breakfast or late dinner all together.
Yet it should be noted, that the area is really lively. There is a city square round the corner full of restaurants and cafes. Downstairs in the same building, right below the apartment there is a bar (for heavy metal fans) and it is rather loud, especially during the weekends. Guests of the bars go out to smoke and have a chat on the street - right below the windows of the bedrooms.
Over all, we liked our stay despite the noise (I guess it is a part of the big city and you just have to get used to it). The communication with Anna was really easy even though we haven't met her in person.