We spent a long famliy weekend with 7 people (6 adults and 1 baby).
The apartment is perfectly located, 2 mins to Girona Metro station and less than 30 minutes to the beach, Sagrada Familia, Les Rambles, ...
The train to the airport leaves at Passeig de Gracia, which is also only 10 minutes walking distance, so it's really easy to get there. It has nice bars and restaurants and also supermarkets, bakeries, ...
The apartment itself is really beautifully equipped, nice details everywhere.
However, it was a bit too small for 7 people, but would fit really well for 4 (e.g. as a family). When using the sofa in the kitchen/living room as third bed, the room becomes pretty small, altlhough it can be stored away with little effort.
Maria provided us with a crib and baby chair, which was really helpful!