The apartment is the perfect spot for discovering Barcelona! Metro is more or less in front of the door, busses the same. Albert and his aunt were very helpful and we could leave our luggage on the last day, as we had a late flight.
Best of all is the balcony: You can see Tibidabo and the Sagrada Familia from there. It is were we started and ended our day! And it is wonderfully calm, because it is on the backside of the building, as is the whole apartment.
I am already looking forward to go back there and will sure recommend it to friends visiting Barcelona.