We stayed during the easter week in Barcelona. The apartment is very good located in the centre of the city. The Sagrada Familia is very good reachable by foot. In a nice neighborhood with a lot of restaurants nearby and the very nice fresh food market Mercat de la Concepcio.
The public transportation is very accessable from the apartment (Metro-Stations Passeig de Gracia, Verdaguer and Girona are nearby).
On the downside the apartment was not very clean. Dusty and a funny smell out of the bathroom.