I really recommend Ancry's apartment for exploring and experiencing Barcelona! Especially the location and the space of the apartment are great assets of the apartment. For two people, there was more than enough space.
There is a metro station nearby and also the city centre is within walking distance. We were welcomed with a bottle of Cava, which was a perfect way for starting the trip. Only for the atmosphere is some room for improvement, and we had some trouble with noise from the neighbours. Yet, it was a perfect place for visiting Barcelona. A special recommendation: eating out at Teresa Carles :).